Home > Custom Screws & Bolts

We have the ability to supply the full range of custom screws and bolts, including but not limited to: cold headed screws, hot headed bolts, machined screws, forged bolts, and multi-tiered manufactured parts. Head styles, drive types, thread types, materials, and finishes we have supplied and are capable of providing are simply too many to list. Our project snapshots below will provide a quick snapshot of some of the types of screws and bolts we have provided.


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  • 7/16-14 Custom Socket Head Cap Screws In 18-8 Stainless Steel Material - 7/16-14 X 6-1/2

    These custom socket head cap screws are manufactured domestically at just 3 pieces for a customer in Texas, with a short lead time of just 1 week from confirmed order.  18-8 stainless steel material was used and a partial rolled thread of 7/16-14 was incorporated to the customer's drawing specifications.

  • Custom #12 Combo Slotted/Phillips Type B Pan Head Sheet Metal Screws

    We supply these custom type B sheet metal screws to a long time customer on an as-needed blanket purchase order basis. It is a #12-11 sheet metal screw at 1-1/4 inches in length with a lead point incorporated per customer specifications. Low carbon steel, case hardened, is used with a commercial zinc and clear chromate finish. This custom screw is made in the USA with a lead time of 4-6 weeks and production runs typically ranging from 50,000 to 100,000 pieces. Internal part number BCPLP-1220-B.


  • Custom 1/2-13 X 8-1/2 Low Head Stainless Steel Socket Head Cap Screws

    This is a custom low profile socket head cap screw we supplied to a customer at just 10 pieces, made in the USA using 303 stainless steel material. It is a coarse thread 1/2-13 part at 8-1/2 inches in length. The threaded portion of the screw is at approximately 3 inches in length. Material certs are available upon request. Our internal part number is SCS-050136-I.


  • Custom 12.9 Alloy Metric Socket Head Cap Screws

    This is a custom M8-1.25M X 24MM socket head cap screw made to print using 12.9 alloy steel with thermal black oxide finish. 4037 alloy steel was used to made these parts in the USA, heat treated to 39-45 HRC. We supply this part on an annual revolving purchase order basis to a long time customer. Our internal part number is CLMP8-SC.


  • Custom 303 Stainless Steel M6 X 31MM Socket Head Cap Screw

    One of the unique aspects of this custom socket head cap screw is the unthreaded shoulder, which was to be 21mm while limiting the thread length to 10mm. The part is manufactured using 303 stainless steel and measures M6 X 31MM.


  • Custom 316 Stainless Hex Bolts - 13/16-10 X 1.75" Hex Head Fully Threaded

    These are custom 316 stainless hex bolts made domestically in the USA in 316 stainless steel material.  The 13/16-10 thread pitch made this hex head cap screw a custom production deal.  The thread was rolled rather than cut and the head width across the flats was set to 1-1/8 inches, with the head height set to 15/32".  Material certs and a certificate of conformance was available upon request.

  • Custom 316 Stainless Tapered Head Screws - 10-13 X 1.75" Thread Forming Screws With Gimlet Point & Custom Rounded Tapered Hex Head

    These custom 316 stainless tapered head screws turned out to be a very tricky part - while the 10-13 thread and gimlet point were easy to incorporate, the custom head was a tough problem to solve.  A 10 degree taper was required on the hex flats and the corners rounded.  A rounded profile on a vertical cross-section of the head was also required to allow the screw to rotate while still maintaining hex head engagement.  It took three rounds of tooling to finally get the head shape just right and fit the application requirements our customer desired.  Domestic production of this part was set at 50,000 pcs with a lead time of 8-12 weeks.

  • Custom 316L Socket Screws - Tapered M5-0.8 X 18MM

    We had 50,000 pcs of these custom 316L socket screws produced domestically for our action sports product customer.  Our goal was to recreate a 70 degree taper on the head profile originally accomplished using a machined secondary process.  The hardness of 316L stainless steel material made this is outcome difficult to achieve using a cold heading process.  After numerous test runs and adjustments the production team was able to achieve the desired result at last.

  • Custom 32tpi Socket Head Cap Screws - 4140 Material With 37-44 Hardness And 1/4-32 Thread Pitch

    These are custom 32tpi socket head cap screws we supplied to our automotive prototyping customer.  4140 plain alloy material was used to produce a small batch of just 25 pieces domestically in the USA.  The 1/4-32 thread pitch was really the only tricky part requiring a custom production run.  Speed was absolutely critical to our customer and we were able to get the parts made and shipped within 2 weeks from order confirmation.

  • Custom 4-40 X 3/8 Slotted Flat Machine Screws in Copper 110 Material

    This is another 4-40 slotted flat machine screw we supply our long time customer, typically in small batches of 50-100 pieces per order. They are 3/8 in length and are manufactured in the United States using Copper 110 material. Material certs are provided with each shipment and blanket purchase order arrangements are always doable.


  • Custom 4140 Steel Shoulder Bolts - M11.5 X 136MM With Special Hex Head, 37-44 RC, Special Dog Point

    These are custom 4140 steel shoulder bolts we supplied to our automotive customer at 100 pieces.  4140 steel material was used with heat treat to achieve 37-44 RC, with plain finish.  The shoulder measured M11.5 x 136MM with a 1.15MM groove approximately 35MM from the special hex head.  The special dog point measures 10.447MM/10.540MM by 5.7MM in length.  Lead time for this 100 piece domestic batch was approximately 6 weeks from order confirmation.

  • Custom 6-Lobe Socket Cap Screws - 4037 Alloy Steel Heat Treated Material

    These are custom 6-lobe socket cap screws made domestically using 4037 alloy steel material.  Strength was absolutely critical to our customer and the parts were heat treated to 39-43 hrc. In the absence of an available drawing for this part we had to work off samples our customer provided for all dimensional attributes.  After confirming the material, strength, and dimensional requirements we had 1,000 pcs produced for our customer with a lead time of approximately 12 weeks from order confirmation.  Heat treat and material certs were included with the parts.

  • Custom 6-Lobe Socket Head Cap Screws - 6-32 X 1-1/4 In 18-8 Stainless Steel Material

    Custom 6-lobe socket head cap screws manufactured domestically in 18-8 stainless steel material at approximately 8,000 pcs. Our customer wanted us to provide these custom screws in black oxide finish after running them through ASTM A967 passivation. Partial unthreaded shoulder was incorporated and the thread was rolled instead of the cut alternative. Lead time for similar projects is currently running at 8-12 weeks from order confirmation.


  • Custom 6-Lobe Stainless Steel Socket Sheet Metal Screw

    This is unique custom 302 stainless steel #4-24 X .900 socket sheet metal screw. It incorporates a 6-lobe socket drive and a partial thread with a AB type point. These special sheet metal screws are supplied at quantities of approximately 2,000 pieces per order and carry a lead time of 6-8 weeks. They are passivated in the final stage of the manufacturing process and are made in the USA.


  • Custom 6-Lobe Wood Screws - 316 Stainless Steel Material With Custom Shape Head

    These are custom 6-lobe wood screws made in 316 stainless steel material measuring 1.888" in length +/- .005".  #10-13 thread tapping thread pitch is rolled after the custom shaped head is cold formed and T20 6-lobe drive incorporated.  Production is done domestically at approximately 50,000 pcs per run and the total quantity was provided to our customer in 2 batches with the first shipment containing 18,000 pcs.

  • Custom Automotive Flat Socket Machine Screw - 1/4-28 X 1/2 In Grade 5 Steel Material With Thread Lock Patch & Level III PPAP

    These are custom automotive flat socket machine screws we supply our aftermarket automotive OEM customer.  Parts are manufactured domestically with production runs of 5,000 pcs and lead time of approximately 8-10 weeks.  Cold headed 5/32 hex drive is incorporated with fully threaded 1/4-28 body and 60 degree countersink angle.  3/32 of hex key engagement is required and nylon thread lock patch is added to finalize the parts.  Level III PPAP was provided to the customer with the parts.

  • Custom Automotive Hardware - Regulator Vented Plug In Grade 5 Material With Level III PPAP

    These custom regulator vented plugs are a perfect example of the large number of custom automotive hardware components we supply our customer base.  We worked with the customer through a number of design iterations to forgo an initial design that included a brazed component and instead go towards a design shown here with a vented hole.  The socket recess provided another challenge - going with a broached alternative would provide a better cost profile but add risk of excess material affecting the vented hole.  Instead we decided to take on the additional cost and run a cold headed process for the recess, providing a clean look and application to the part.

  • Custom Bead Blast Flat Socket Screws - AISI 303 Stainless Steel Material

    Approximately 34,000 pieces of these custom bead blast flat socket screws were supplied to our customer in the defense manufacturing sector.  Half the parts were set at 1.29" length while the other half set to 1.695" length.  The same 1/4-28 thread was incorporated on both parts and the socket drive was cold headed.  A spherical readius shape was incorporated into the top of the flat head, which is difficult to discern in the photos shown.  The head height measured .097" and the head diameter at .375".  Glass bead blast process was used to add the matte sand finish desired by our customer.

  • Custom Button Flange Socket Cap Screws - 8-32 X .50 In Grade 2 Steel With Nylon Patch

    These custom button flange socket cap screws were produced using grade 2 steel material with black oxide finish and nylon patch thread locking feature.  Full 8-32 thread was incorporated and the flange diameter was set at .357" +/-.005".  Head height including the flange was to be at .087" +/-.005" and a 3/32 socket drive was cold headed during the production process.  The blue nylon patch was applied over 180 degrees of the covered threaded section.

  • Custom Button Head Socket Screws With Half Dog Point - 5/16-24 X 1" In 18-8 Stainless Steel Material

    These are custom button head socket screws with half dog point used in an aerospace assembly application by our long time customer.  18-8 material is used to domestically manufacture these parts and the half dog point measures .225-.235 diameter by .150-.170 inches in length.  The screw itself measures 5/16-24 X 1" and we had these produced at a small quantity of just 25 pieces with rush service at 2 weeks lead time.  Material certs, inspection report, and certificate of conformance was provided with the parts per our aerospace customer's specifications.

  • Custom Captive Stainless Screws - 10-32 X 1.76 In 18-8 Stainless Steel Material

    These are custom captive stainless steel screws we supplied to our construction customer, who refers to them as "Gripper Screws".  Production was done domestically in the USA at approximately 5,000 pieces and a lead time of 6-8 weeks.  The multi-step flat head was made using a cold heading process and the 10-32 thread was rolled at 0.2" in length.  The diameter of the unthreaded shoulder was set at 0.14" +/-.015.

  • Custom Combo Drive Machine Screws - 10-32 X 3/8 Phil/Slot Pan Head M/S In Steel Zinc

    These are custom combo drive machine screws measuring 10-32 X 3/8.  They are manufactured domestically using steel zinc material with production runs typically at 200,000 to 250,000.  We stock and release this part to our long time OEM customer with revolving annual blanket purchase orders.

  • Custom Deep Recess Phillips Drive Screws - #8 X 2" Phillips Pan Type A Sheet Metal Screws

    At first glance these custom deep recess phillips drive screws seem like ordinary sheet metal screws. For the most part that is true - the Type A thread and head dimensions are essentially per IFI specs without any modifications. A closer look however will reveal a significantly deeper recess in the phillips drive. Standard #8 phillips drive for a pan head reaches a depth of .108" while this custom part has a recess depth of .120" to .122" - a significant difference when it comes to improved engagement and faster/easier use on the production floor. This improvement in speed and engagement was the main driver behind our customer's request for this modified sheet metal screw, particularly important when some of the depth is used for paint when the screw heads are painted a variety of different colors.


  • Custom DFAR Compliant 6-32 X 5/16 Socket Head Cap Screw

    This is a custom DFAR socket cap screw we supplied to our aerospace customer at just 55 pieces - it was made in the USA using ASTM A-276 stainless steel material to the customer's specific requirements. Material certificates, dimensional test report, and certificate of conformance were provided with the parts.


  • Custom DIN 7991 M14 X 50MM Flat Socket Cap Screw In Class 10.9 Alloy Steel

    We supply our customer base countless custom made metric socket screws like this special to print M14 X 1.5M X 50MM flat socket cap screw in 10.9 alloy steel, with plain and light oil finish. This custom socket screw is supplied in small quantities from 10-50 pieces at a time and is often used in automotive and motorcycle applications.


  • Custom Dog Point Screws - 10/24 X 5/8 Socket Head Cap Screws In 18-8 Stainless Steel With Half Dog Point

    We have been supplying our long time OEM customer with these custom modified parts for many years.  They are 18-8 stainless steel socket head cap screws with a half dog point.  Flatness of the point is most critical to our customer's application and the process had to be refined over the first few years to get it absolutely right.  The half dog point dimensions are based on ASME B18.3-2003.

  • Custom Extra Long Hex Bolts - Partially Threaded 3/8-16 X 14" In 307A Material With Zinc Clear Finish

    These are custom extra long hex bolts we have supplied our customer for many years, with shipments of approx 20,000 pcs at a time every 2-3 years. 307A steel material is used with zinc clear finish and all parts are manufactured overseas. 1.5" to 1.688" of thread is rolled on each part and the hex head height is set to .226-.268 inches. R0.01-0.03 underneath the head is critical for our customer's application, allowing the head to lay as flat as possible against the mating part.


  • Custom Flat Socket Head Cap Screws - 2-56 X .335/.345 In 18-8 Stainless Steel Material

    These are custom flat socket head cap screws manufactured domestically using 18-8 stainless steel material.  The production run was relatively low in quantity at approximately 10,000 pcs, with a standard non-expedited lead time of 6-7 weeks.  Material certs, certificate of conformance, and passivation certs to QQ-P-35 were provided with the parts.

  • Custom Grade 5 Automotive Screws - Tricky 1/4-32 Thread With Nylon Thread Locking Patch

    These custom grade 5 automotive screws are exactly the same dimensionally as the 1/4-28 version shown in one of the previous posts but with two specific distinctions: the thread had to be 1/4-32 instead for this 2,500 pcs batch and the lead time had to be FAST.  To accomplish this the hex socket drive was broached instead of cold heading, the marks of which you can see at the very bottom of the hex recess.  That allowed us to save weeks of lead time and we also expedited the thread lock application process as well as all the transit in between processes.  Level III PPAP paperwork is provided with the parts per our customers original request and requirement.

  • Custom Grade 5 Hex Cap Screws - 5/16-24 X .875 With Black Oxide Finish

    We have supplied these custom grade 5 hex cap screws to our customer for well over 10 years.  The parts are manufactured domestically, with production runs typically covering 50,000 pieces at a time.  The shoulder is critical on these parts, set at .312" in diameter +/- .005" and at 1/4" in length.  Head dimensions slightly off the standard for this size and the finish is black oxide and light oil.  

  • Custom Grade 5 Shoulder Bolts - Steel & Commercial Zinc Finish

    We supply these custom grade 5 shoulder bolts to our long time customer with recurring annual blanket purchase orders, typically with annual usage ranging between 20,000 and 25,000 pieces.  They are domestically manufactured to a grade 5 standard with commercial zinc, bake and clear chromate finish.  The shoulder measures .40" in diameter by .50" in length, with 5/16-18 thread rolled the balance of the screw.  The overall length is 1-1/4" underneath the head.

  • Custom Grade 8 T-Bolts

    These are custom 3/4-10 T-bolts made using Grade 8 40 CR material, with plain and light oil finish. It is supplied in combination with the coupling nut and washer as shown below. Sold on an annual blanket purchase order basis, this part is made overseas with our long time trusted factory source and is provided with all necessary paperwork/certs.


  • Custom Hex Flange Screws, Class 10.9 - M12 X 1.75 X 30MM With Black Phosphate Finish

    These are custom hex flange screws we supplied to our automotive customer in grade 10.9.  The size and thread pitch is relatively common in the marketplace but the 10.9 class is a tricky find.  With the large volume required we had the parts domestically produced with black phosphate finish.  Measuring M12 X 1.75 X 30MM the hex flange head measured 23-25MM in flange diameter and 14.5-15.0MM across the flats.  Head height was set to 12MM +/-1MM, inclusive of the flange.  Full certs were available to the customer upon request.

  • Custom Hex Shoulder Screws - 4340 Alloy Steel

    We supply these custom hex shoulder screws to our Canadian customer, with the shoulder measuring .425 +/-.002 by 1.650 +.005/-.000 in length.  5/16-18 thread was incorporated measuring .50" in length including the unthreaded portion before the rolled thread begins.  .055 radius hole was then drilled at .102" from the end of the threaded portion.

  • Custom Hex Washer Head Trilobular Screws - 10/32 X 1/2 Unslotted Thread Forming Screws in 410 Stainless Steel

    We supply our customer base a large number of different thread forming screws like these custom hex washer head trilobular screws manufactured overseas in Taiwan.  They measure 10/32 X 1/2 and are made using 410 stainless steel with heat treat for additional hardness and passivation to complete the production process.  Production is typically run at 100,000 pieces and we supply it to our long time OEM customer using 12 month blanket purchase orders.

  • Custom Knurled Hardware - Test Knurling Samples For Custom 41L40 Steel Plate Bolts

    Over the years we have provided countless custom knurled hardware pieces - below is a snapshot of a custom bolt we are working on producing for a customer that is intended to be hammered into a pre-drilled steel plate.  We noticed that the spec calls out for diamond knurling but realized that probably won't work for the intended purpose, which is to keep the bolt from spinning after being inserted.

    After discussing it with the factory engineers we suggested going with a straight knurl instead of the diamond knurl.  The straight knurl would work better in keeping engagement.  We put together these samples to allow our customer to test the idea before incorporating it fully into the production run.  The production parts would be made using the same 41L40 steel material with a zinc plated finish.

  • Custom Knurled Shoulder Bolts - 41L40 Material With Zinc & Clear Finish

    These custom knurled shoulder bolts are the result of the tests we ran with different knurling methods mentioned in one of the previous posts.  Parts came out perfectly but we did run into some challenges with the lead times, being behind initial expectations due to tooling delays early in the process.  We had to throw money at expediting every part of the process where possible to try to limit our delays as much as possible - some sleepless nights worrying about these bad boys and our customer's dire need.  Every good factory and secondary processor across the nation is absolutely swamped so make sure to buffer lead time expectations as much as possible.

  • Custom Length Shoulder Bolts In Stainless Steel - 1/4 X 1"

    We supplied these custom length shoulder bolts to our audio device manufacturer.  The shoulder bolt is essentially an off-the-shelf 1/4 X 1 shoulder bolt with 10-24 rolled thread in 18-8 stainless steel material.  Our customer was unable to use this version as-is due to the combined length of threaded portion and the machined fillet preceding it.  In order to make use these parts that combined length had to be at .24"  +/- .01".  As a relatively simple operation we ran these parts through a cut and chamfer operation to get them to the correct length.  Lead time for this operation was 1-2 weeks from receipt of the off-the-shelf version.

  • Custom Low Head Metric Screws - M3 X 0.5MM X 3.25MM With Thread Locking Patch in 303 Stainless Steel Material

    Custom low head metric screws manufactured domestically using 303 stainless steel material. The 1/16 hex drive was broached with a 1.5MM drive depth. Heavy torque blue thread locking patch was applied to conform to a .60 to .33 Nm minimum torque testing. Head height measured 1.75MM and the width at 9.65MM. The rounding around the edges of the head was set to R 0.020. Production samples were provided for customer testing and approval prior to commitment to a full production run. Lead time for production is 8-10 weeks from confirmed order. Certificate of conformance, First Article Inspection Report, material cert, and passivation cert were required with the parts per our customer's request.


  • Custom Low Head Slotted Machine Screws - 8-32 X .375" In 12L14 Steel

    These custom low head slotted machine screws were manufactured domestically using 12L14 steel material and then run through a commercial black oxide process.  Length under the head was set at .375" +/-.03", fully threaded with 8-32 thread pitch.  The head height was set at .055", diameter at .265", slot width at .05", and slot depth at .042".  Our internal part number for this item is MSF-0806-AF and while lead time varies quite a bit depending on production volume required, we typically budget 6-8 weeks from order confirmation.

  • Custom Low Head Socket Cap Screws - 1/4-20 X 1 Low Head Socket Head Cap Screws In Black Zinc With Nylon Thread Locking Patch

    These are custom low head socket cap screws we supply to an offroad automotive product manufacturer.  We have a revolving blanket purchase order arrangement with next day deliveries of the parts from the individual releases.  Measuring 1/4-20 X 1 to standard IFI specifications, these low head socket cap screws are made in plain grade 5 steel material with black electroplated zinc finish for corrosion resistance.  A standard nylon thread locking patch is applied as the final part of the process to get the parts ready for use.

  • Custom Low Head Socket Cap Screws - M5-0.8 X 28MM and 33MM

    We supplied these custom low head socket cap screws in alloy steel material with black oxide finish. Two different lengths were required by our customer - 28MM and 33MM under the head. We used COTS version of this DIN7984 socket cap screw at 35MM as the base part, then cutting and chamfering the parts to the appropriate lengths. The last step was the black oxide process - we mixed both sizes together to minimize the per piece cost to our customer. Since we used a standard off the shelf part to create the modified version the lead time was relatively fast at 1-2 weeks from receipt of production order. That lead time can change significantly if the base part has limited availability.

  • Custom Low Profile Socket Head Screws - 302 Stainless Steel With 6 Lobe Drive

    These custom low profile socket head screws with a  6-lobe (torx) drive were manufactured domestically using 302 stainless steel material with a commercial passivated plain finish.  5,000 pieces of two sizes were produced: M10 - 1.5M X 65MM with a T-45 drive size and M8 - 1.25M X 65MM with a T-30 drive size.  26-30MM of thread was incorporated on the larger version and 22-25MM on the smaller diameter part.  The low profile & 6-lobe drive combination is relatively tricky, especially for these larger diameters as additional controls in tooling are required to avoid flowering on the outside profile of the head.

  • Custom Low Profile Torx Machine Screws - 18-8 Stainless Steel

    These custom low profile torx machine screws were manufactured domestically using 18-8 stainless steel material, at production volume of approximately 5,500 pieces.  T10 size 6 lobe drive was incorporated and the head diameter at .262" +/-.01" and head height at .263" +/-.01.  6-32 thread was selected for the .185" of thread, followed by a lead point measuring .090" +.000/-.002 in diameter and .050" +.020/-.000 in length.  Parts were passivated per MIL QQ-P-35 Type II to complete the production process.

  • Custom Metric 316L Set Screws - M5-0.8 X 6MM Short Dog Point Socket Set Screws

    We ran an order of these custom metric 316L set screws with a short dog point at just 66 pieces using domestic production. Lead time was relatively short at just 2-3 weeks from confirmed purchase order receipt. A short .059 dog point was incorporated and a 2.5MM hex socket drive was broached for speed and cost efficiency. Overall length was set at 2.36 inches and the tolerance on all dimensions was set at +/- .005 inches. Great detail can be seen in the print included here as a reference.

  • Custom Metric Button Socket Cap Screw In 302 Stainless Steel

    This is a special to print custom button head cap screw we supply a long time customer on an annual basis at approximately 5,000 pieces - it measures M3 X 0.5 X 7.24MM.  They are supplied in increments of 5,000 pieces and are made in the United States using 302 stainless steel material with passivation as the final stage in the process.  Fine thread and a special to print point is incorporated in these parts, which resembles an oval point on a standard set screw.

  • Custom Metric Button Socket Cap Screws - M3 X 0.5 X 6MM In Alloy Steel

    These custom metric button socket cap screws are made using alloy steel material at 32-36 HRC with black oxide finish.  The head diameter is 5.7MM and head height at 1.65MM, with a 2.0MM hex drive size.  The overall length underneath the head is set at 6MM, of which 2.5MM is designed to be the un-threaded shoulder.  Cold heading process was used to shape the head and the thread was rolled for optimal strength.

  • Custom Metric Button Socket Screws In 18-8 Stainless Steel Material - M3 X 0.5 X 7.24MM

    These are custom metric button socket screws we supply to our long time customer in 18-8 stainless steel material.  It is an M3 X 0.5 X 7.24MM button socket head cap screw with a 2MM hex socket drive at 1.04" minimum depth.  Production lead time is typically between 6 and 8 weeks, done domestically and supplied with material certs and certificate of conformance.  Our internal part number is 110319.

  • Custom Metric Fine Thread Hex Cap Screw in A2 Stainless Steel

    This is a small quantity order of custom fine thread metric hex head cap screws in A2 stainless steel material we supplied to one of our OEM customers - we supplied a small batch of 100 pieces and the parts measured M8 X 1.0 X 30MM. The hex cap screws were made fully threaded to the customer's specific instructions. Lead time was 2-3 weeks from order.


  • Custom Metric Flange Bolts - Made Using 316 Stainless Steel Material

    We supplied our industrial design customer these custom metric flange bolts in two different sizes, M12-1.75 X 35MM and M12 -1.75 X 45MM.  Small batch of 100 pieces in each length was manufactured using our overseas production facility as a test run to allow our customer to test the parts in their mold application prior to a full production run.  Due to the small quantities involved, the parts were machined rather than cold or hot headed.  The machining process is much faster because it avoids lengthy and costly tooling and machinery set up, which would not be cost effective for a small run.

  • Custom Metric Hex Head Fully Threaded Cap Screw in 410 Stainless Steel

    This is an M6 X 1.0 X 60MM hex head cap screw that is fully threaded per customer's specifications and manufactured in the United States using 410 stainless steel. Parts are then heat treated for required hardness. A similar part is supplied for the same customer at M5 diameter, which will be shown as a separate entry. Both parts are supplied on a one-time release basis at 5,000 pieces each.



  • Custom Metric Rolled Thread Screws - DIN912 M14 X 1.5M X 88MM Class 12.9 Alloy Steel

    We have been supplying these 12.9 alloy steel custom metric rolled thread screws for over 10 years to an automotive aftermarket OEM.  The alloy steel socket head blanks are ground to a smaller diameter to allow for the M14 thread to be rolled, which is a specific requirement with our customer.  We supply these parts on a revolving annual blanket purchase order to spread out the cost for our customer and lock in better pricing.  The releases are delivered the same or next day from the initiated request.

  • Custom Metric Socket Cap Screws - M2-0.4M X 6MM Socket Head Cap Screws In DFARS Compliant 303 Stainless Steel

    These are M2 X 6MM DFARS compliant socket cap screws whose simplicity in look is misleading to say the least.  We were tasked to replicate our customers existing samples and the combination of the hex broach dimensions and depth together with the countersunk angle required a different approach than a standard flat socket head screw.  The part was initially made like a standard socket cap screw without the countersink, broached to required depth, and then machined down for the countersunk angle.  Finally the part was then threaded and passivated.

  • Custom Metric Socket Cap Screws With Zinc Yellow Finish And 1193S Thread Locking Patch - M5 X 0.80M X 16MM In Alloy Steel

    These are custom metric socket cap screws with an undersized head diameter that we have provided to an aftermarket automotive product manufacturer for many years.  Measuring M5 X 0.80M X 16MM, the socket cap screws are domestically manufactured in alloy steel material and then finished with zinc yellow finish.  The final step involves the application of 1193S thread locking patch on each screw.  Our internal part number for this custom item is DIN912-05016-C1193S.

  • Custom Modified Grade 8 Machine Screws - Special Head Shape

    These custom modified grade 8 machine screws were made using 5/16-18 X 1-1/4 Grade 8 hex head cap screws in grade 8 steel material with zinc/clear finish.  The head of each COTS part was machined to the shape seen here, with the head height at .190" +/-.005" and head diameter at .485" +/-.005".  Single flat .42" section was incorporated at one section per our customer's provided sample piece.  Total of 300 pieces were modified on this specific production run and the lead time was approximately 2 weeks from the order receipt.

  • Custom Monel 400 Socket Head Cap Screws - 5/8-11 X 3-1/2 With Cut Thread

    These are custom Monel 400 socket head cap screws measuring 5/8-11 by 3-1/2" in length.  Domestically produced with a lead time of just 4 days, the 4 pieces we had manufactured incorporated coarse cut thread and a broached socket head drive.  Material certs and a certificate of conformance was provided with the parts per our customer's request.

  • Custom Nylon Point Set Screws - 8-32 X 1" In Stainless Steel Material

    We supply our electronics manufacturing customers a large array of custom and specialty fastener products like these custom nylon point set screws.  The set screws themselves are domestically made using 18-8 stainless steel per our customer's specifications.  Lead time for 3,000 to 5,000 pieces is typically 2-3 weeks from order confirmation.

  • Custom Oval Point Set Screws - 7/16-14 X 7/8 in 18-8 Stainless Steel Material

    These are similar to other custom oval point set screws we supplied to the same customer - they are also manufactured domestically in the USA at just 100 pieces in 304 stainless steel material.  Lead time for production was just 7 business days, with another 3-4 days for shipping to our Santa Ana location.  These custom set screws measure 7/16-14 X 7/8 and our internal part number is SSO-4314-I.

  • Custom Oval Point Set Screws In 18-8 Stainless Steel - 1/2-13 X 1"

    These are custom oval point set screws made domestically in the USA using 18-8 stainless steel material.  While this 1/2-13 X 1" size is fairly common off the shelf in a cup point version, the oval point is a tough find and typically requires a special production run.  We were able to get these set screws completed within 1 week at 100 pieces.  Material certs and our certificate of conformance was available with the parts.

  • Custom Phil Flat Machine Screws To Print - 1/4-28 X 13/16 In Steel With Black Oxide Finish

    These custom phil flat machine screws are made domestically in the United States using low carbon steel material with black oxide finish and light oil.  We supply them on revolving 12 month blanket purchase orders with other custom hardware items the same customer purchases from us.  Initial lead time for custom machine screws like these is 5-6 weeks from order and drawing approval.

  • Custom Ribbed Neck Carriage Bolts - 1/4-20 X 7/8 In Grade 5 Steel Material With Zinc & Bake

    These are custom ribbed neck carriage bolts we supply to one of our oldest customers.  They measure 1/4-20 X 7/8 and are manufactured domestically in the USA in Grade 5 steel material, with zinc and clear finish.  Production lead time is typically approximately 6-7 weeks for this custom part and all certs are available upon request.

  • Custom Slotted Flat Copper Machine Screws - 4/40 x 5/16 in 110 Copper Material

    These custom slotted flat copper machine screws are one of multiple sizes we have supplied our customer over the years.  They are custom made each time as ordered due to relatively small usage and are typically shipped within 2-3 weeks of order.  This specific 4/40 X 5/16 version was produced domestically at 1,100 pcs under our internal part number MSF-0405-Z.  Material certs are made available upon request and expedited processing is typically available, depending on raw material availability.

  • Custom Slotted Reverse Drive Machine Screws - 1/4-20 X 1" In Zinc Plated Steel Material

    These are custom slotted reverse drive machine screws made domestically in the USA using low carbon steel material with commercial zinc and clear finish.  Approximately 12,000 pcs were produced with a lead time of 8-10 weeks.  The heads were cold headed and the slotting was done as the last stage in the process prior to zinc plating.  Material certs and certificate of conformance was made available to the customer as needed.

  • Custom Socket Head Screws With A Drilled Point

    These are custom socket head screws with a low profile head measuring .270 X .078 inches, made in the USA using 303 stainless steel material.  The thread incorporated is 8-32 at 7/8" in length, with the remainder of the length as an un-threaded shoulder.  The point on these custom socket bolts has a machined socket drive matching the hex drive on the low profile head.  These unique custom screws were produced in under one week for our customer's urgent needs.

  • Custom Socket Shoulder Screws With Thread Locking Nylon Patch - 6-32 X .393" In Grade 2 Material With Phos Finish

    These are custom socket shoulder screws made using grade 2 steel material with phos finish and a thread locking patch.  Measuring 6-32 X .393" with a shoulder at .080" and head height at .125" this custom socket shoulder screw is manufactured overseas in increments of 100,000 pieces to be released to our long time customer on an as-needed blanket purchase order basis.  Initial lead time for the first release is typically 120-150 days from order confirmation.  When needed, we can provide a print with dimensions and tolerances for the customer to approve prior to production start.

  • Custom Stainless Button Head Cap Screws - Partially Threaded

    These are custom stainless button head cap screws with partial 8-32 thread made domestically in the United States to the customer's print.  303 stainless steel material was used and the unthreaded shank of the custom screw was made to a diameter of .125".  The 8-32 threaded portion was maintained to a max .225 inches in length.  The button head diameter was maintained within a maximum of .312 inches.

  • Custom Stainless Steel Button Socket Head Screws To Print

    This is a custom made 8-32 X 1" button socket head screw made in the USA using 302HQ material per customer specifications. We typically supply this part in quantities of 5,000 - 10,000 pieces and lead times vary between 5 and 7 weeks from order.


  • Custom Stainless Steel Low Head Socket Cap Screws

    This is a custom 303 stainless steel screw domestically manufactured for a customer in the aerospace industry. Initially just 10 pieces were made for testing purposes prior to a commitment for larger full production volume quantities. The screw measures 6-32 X 1/2" and the head height is limited to just .025 inches and the head diameter is held to .280" +/- .005". The custom socket screw was used in combination with an o-ring in the final application as a sealing screw.


  • Custom Stainless Steel Shoulder Bolts - 1/8 X 1-1/2 Shoulder

    These are custom stainless steel shoulder bolts made domestically in the USA using 18-8 stainless steel material.  We typically run production at approximately 10,000 pcs per order for our customer and the lead time ranges between 5 and 6 weeks from confirmed order.  The shoulder measures 1/8 X 1-1/2, with 4-40 thread.

  • Custom Stainless Tamper Proof Sheet Metal Screws - 6-18 X 1/2 Oval One Way Type A Sheet Metal Screws In 18-8 Stainless Steel

    These are custom stainless tamper proof sheet metal screws measuring 6-18 X 1/2 inch in length.  A tamper resistant one way oval head is incorporated with type A sheet metal screw thread.  We have these parts manufactured domestically at 30,000 to 50,000 pieces and release them to our customer as needed throughout the year.  18-8 stainless steel material is used on these specific one way oval screws but we also supply an identical part in 316 stainless steel material.

  • Custom Steel T-Bolts With Zinc Clear Finish - 8-32 X 3/4

    These custom steel T-bolts were manufactured domestically using medium carbon steel material with zinc clear finish.  8-32 thread was incorporated at a length of 3/4" underneath the head.  The head height is set to .04", head width across the flats at .32", and the width across the rounded sides at .438" +/-.015" max.  Lead time for mass production of a similar part is typically 8-10 weeks from order confirmation.

  • Custom Trilobular Thread Forming Hex Washer Head Screws

    We supply our diverse customer base hundreds of custom made to print trilobular thread forming screws in both steel and stainless steel materials. This particular special thread forming part measures 10-24 X 3.19" and is manufactured to print overseas in Taiwan in steel/zinc; it is then supplied to our customer on an as-released blanket purchase order basis.


  • Custom Unique Thread Pitch Screws - 3/8-20 X 1-1/4 Socket Head Cap Screws in 18-8 Stainless Steel Material

    These custom unique thread pitch screws were one of the stranger projects that we came across - it was the first time in over 20 years that someone requested a 3/8-20 thread pitch.  We had the custom screws manufactured domestically at just 40 pieces using 18-8 stainless steel material.  The lead time was at approximately 3 weeks from order confirmation.

  • Custom Unslotted HWH 10/24 X 5.45 Thread Forming Screw in Stainless Steel

    Engineered Source has now been providing this special unslotted hex washer head taptite thread forming screw for many years. Domestically manufactured to print, this custom part measures 10/24 X 5.45 and is made using 302 stainless steel, with stain and wax as the final secondary service to get the parts ship ready.


  • Custom Vented Screws In Invar 36 Material - 8-32 X 5/8 And 6-32 X 1/4

    Measuring 8-32 X 5/8 and 6-32 X 1/4 both are made using Invar 36 material with a vent drilled hole running the full length of the screw. Invar 36 material has a very low level of thermal expansion and is typically used for applications where dimensional changes due to temperature variation must be minimized as much as possible. The hex socket drive was broached for both parts, in lieu of a cold headed alternative.


  • Extended Thread Large B7 Hex Bolts - 7/8 X 9 ASTM A193 B7 Hex Bolts With Reworded Extended Threads

    Our customer needed 24 pieces of these extended thread large B7 hex bolts, measuring 7/8 X 9 with coarse thread.  The cut thread was extended as far as possible for each of the 24 pieces and the turnaround for the small quantity was relatively fast at just a few business days.  The finalized hex bolts were supplied with nuts and washers.

  • Invar 36 1/4-20 X 1-1/4 Socket Cap Screws

    We were presented with the challenge of having custom 12 socket cap screws made out of Invar 36 material to a provided print in a relatively short period of time, which is essentially a 36% nickel iron alloy material, with matching finished hex nuts. This material is typically used for applications where dimensional properties must be maintained across a broad range of temperatures. We were able to have the parts produced and delivered within 3 weeks of order date. While in this specific case no certifications were required, various documentation would have been available to the customer if requested and required.


  • Modified Truss Self Tapping Special Screw to Print

    Some years ago our customer approached us with the task of creating this self piercing screw for a specialized assembly application. It has since become a consistent item we carry to ensure adequate supply for their need at all times. The part is a modified truss head self tapping type A screw, with a phillips drive. Measuring 9-9 X 1-5/8 in length this part is a special screw manufactured to print using 18-8 stainless steel, followed by a passivation process.


  • Special 10-16 X 1/2 Phil Pan Hi-Lo In 316 Stainless Steel, Chrome Plated

    These parts are manufactured overseas and supplied to our customer on a blanket as-released purchase order basis.  We originally supplied this 10 X 1/2 phil pan hi-lo in plain 316 stainless steel material but at some point our customer needed additional corrosion resistance in their application.  At that point we had our inventory supply barrel plated to the pictured chrome finish and all future imported parts would come in already chrome plated.  Domestic chrome finish, whether barrel plated or individually racked, typically has a much brighter finish than the finish found on large volume imported parts.

  • Special 5/16-18 X 1-1/4 Hex Shoulder Bolt In Grade 5 Steel Zinc

    We have been supplying this special hex shoulder bolt to the same customer for over five years, made in the USA using grade 5 steel and zinc plated.  Approximately 12 months of supply is carried at all times and parts are released to our customer as needed based on their production.  Blanket purchases are used on a rotating basis to lock in pricing and ensure adequate supply at all times.

  • Special 7/16-20 Left Hand Thread Hex Head Bolt in 1018 Cold Rolled Steel

    This is a special 7/16-20 hex head bolt with left hand thread that we have been supplying the same customer for over 5 years.  It incorporates a special marked stamp per the customer's print and is manufactured using 1018 cold rolled steel, which is carburized to 1700 degrees, soaked for 2 hours, and oil quenched.  Like many of the parts we supply this special part is supplier on an as-released blanket purchase basis.

  • Special 8-18 Partially Threaded Machine Screw With Tapered Point

    This is a special partially threaded machine screw supplied to our customer at 30,000 pieces. The part is made using 18-8 stainless steel and is slightly tapered at the point to allow for faster use in the customer's application. The head is a slightly off-standard pan head with a phillips drive. Parts are made in the United States.


  • Special DIN965 Metric Phil Flat Machine Screw

    This is a special phillips flat DIN965 machine screw measuring M3 X 0.5 X 9MM and manufactured in the USA using steel with zinc plating finish.  These parts we typically supply to our customer with a production run for each order at the quantity requested, typically around 3,000 pieces.  While a variety of M3 X 0.5 DIN965 screws are available as standards, the 9MM length is often an impossible item to find off the shelf and requires production as a special.

  • Special Flat Head Socket Cap Screw in 304 Stainless Steel

    This part was provided in just 20 pieces for testing purposes, after which we would have our other factory source produce 5,000 to 10,000 pieces.  The 1/4-20 X 1" socket cap screw was made to a print provided by the customer, with a 100 degree head at a larger diameter than the standard for this thread size.

  • Special Flat Head Socket Cap Screw to print in 4140 Alloy Steel

    This special socket cap screw is used by our customer for initial testing purposes before committing to a larger quantity in 304 Stainless Steel material - this batch was made using 4140 Alloy Steel at 60 pieces to save money at the testing stage. Lead time for this part was 8 days from order.


  • Special Grade 8 Socket Cap Screw With Black Oxide & Oil Finish

    This is a special 10-32 X .590 socket head cap screw made in the USA using Grade 8 steel with black oxide finish.  It is a part we have supplied for many years on a blanket as-released purchase order basis, typically holding 6-12 months of supply at all times to allow for maximum flexibility to our customer.

  • Special Indented Hex Washer Head Thread Forming Screws

    Engineered Source supplies a large number of special thread forming screws like this #10-32 X 3.72" unslotted indented hex washer head trilobular screw.  This specific part has been supplied to the same customer for over five years and is sold on a blanket purchase order basis.  It is manufactured in Taiwan using 18-8 stainless steel, passivated and waxed to our customer's specifications.

  • Special M3 X 0.5 X 10MM Socket Cap Screw in C276 Hastelloy Material

    Engineered Source is your one-stop shop for hastelloy special fasteners, for both small and large quantities, with lead times for smaller quantities as low as 3 weeks. This specific part is a M3 X 10MM socket cap screw made using C276 Hastelloy material, manufactured in the United States to an order of just 12 pieces.
  • Special Made DIN912 M12 X 1.5 X 70MM Socket Cap Screw

    We supply countless metric fasteners to our customer base and often due to availability or additional customer specific requirements we have a number of alloy socket cap screws special made to order.  This DIN912 M12 X 1.5 X 70MM is a perfect example.  We provide this socket screw to our customer on an as-released blanket purchase order basis and typically stock a 6 month supply at any one time.  It is made in the USA in 12.9 alloy steel material with plain and light oil finish.

  • Special Metric Hex Head Fully Threaded Cap Screw in 410 Stainless Steel

    This is an M5 X 0.8 X 60MM hex head cap screw that is fully threaded per customer's specifications and manufactured in the United States using 410 stainless steel. Parts are then heat treated for required hardness. A similar part is supplied for the same customer at M6 diameter, which will be shown as a separate entry. Both parts are supplied on a one-time release basis at 5,000 pieces each.



  • Special One Way Round Head Tamper Proof Machine Screw

    Engineered Source supplies a number of different tamper proof fastener types in a variety of materials, both standard off the shelf parts and special to print fasteners like this one way round head machine screw.  These parts are 4-40 X 1/4 and were manufactured in the United States using 302 stainless steel material.

  • Special Panel/Captive Screw With O-Ring

    This is a special captive screw measuring 10-32 X 2-3/8 manufactured in the United States using 18-8 stainless steel material.  It has a standard pan head with a phillips drive and is partially threaded to act as a captive/panel screw.  An o-ring is incorporated on each screw to our customer's specifications.  We have carried this part on a blanket as-released purchase order basis for the same customer for over five years.

  • Special Phil Pan Machine Screws With Black Oxide Finish and Thread Locking Patch

    We supply countless parts to our diverse customer base that incorporate one or more secondary services and finishes. This stainless steel 4/40 X 3/16 phil pan machine screw is a good example. It is made using 18-8 stainless steel and is then run through a Class 2 Black Oxide treatment. The final step is a nylon 11 thread locking patch application. We supply these specific machine screws to our customer on a revolving annual blanket purchase order basis.


  • Special Phillips Shoulder Screw to Print - 1/8 X 1/4 With 4/40 Thread

    This is a special shoulder screw to print we have supplying for a number of years, manufactured in the United States using 304 stainless steel and distributed to the customer on as needed release basis with a blanket purchase arrangement. Lead time for an item like this based on a quantity of approximately 10,000 pieces is 8-12 weeks, with significantly shorter lead time available for a small quantity run using one of our specialty small quantity manufacturing partners.


  • Special Phillips/Slotted Hex Washer Head Machine Screw

    This is a part we supply our long time customer on an as-needed basis every two years or so at approximately 40,000 pieces per order.  It is a M4-0.70 X 9.5MM phillips slotted combo drive hex washer head machine screw made using steel material with black oxide and light oil per customer specifications.  Made in the USA this part typically carries a 5-6 week lead time from order.

  • Special Shoulder Bolt To Be Coupled With Bronze Bearing

    This custom shoulder bolt was made to print for our customer and measures 7/8 X .540 X 3/4-16. 18-8 stainless steel was used to produce the parts at a domestic US manufacturing plant. It was intended to work in unison with the flanged bronze bearing manufactured to print for the same customer. That part is shown in greater detail in the consequent blog post.


  • Special Slotted Fillister Captive Screw

    We supply custom made captive screws in both small and large quantities.  This is a special 8-32 X .47 slotted fillister captive screw made using 304 stainless steel.  It is manufactured in the United States and can be supplied to order in as few as 10 pieces.

  • Special Slotted Fillister Head Machine Screw In 18-8 Stainless Steel

    This is a special 2-56 X .625 inch slotted fillister machine screw in 18-8 stainless steel material, made in the USA at a relatively small quantity batch of 500 pieces.  Parts are provided to our aerospace customer with a AS9102 compliant First Article Inspection Report (FAIR) and a number of required certificates.

  • Special Slotted Flat Head Machine Screw in Copper 110 Material

    This is a small 4-40 X 5/16 special copper machine screw supplied at just 100 pieces. Small quantity special fastener orders like this are a daily routine for us and we can supply specials to print in just about any material. Copper 110 material was used on this specific part and we were able to deliver the parts to our customer within 10 business days from order.


  • Special Socket Shoulder Screw In 303 Stainless Steel

    Engineered Source is a long time supplier for a number of electronics manufacturers and over the years the number of custom and standard shoulder screws carried has grown exponentially.  This is a special 3/16 X 1-1/2 socket shoulder screw in 303 stainless steel with 8/32 thread sourced from an overseas factory we have worked with for almost a decade.

  • Special Socket Shoulder Screw to Print: 1/8 X 3/8 in 303 Stainless Steel, 4-40 Thread

    This is a special socket shoulder screw made to our customer's prints that we supply over the course of the year on as-needed basis.  Manufactured in the United States, this part is made using 303 stainless steel with a shoulder measuring 1/8 X 3/8 inches and thread at 4-40.  Standard lead time for this part is 6-8 weeks upon placement of purchase order.

  • Special Thread Cutting Screw With Type 17 Point

    Custom thread rolling and thread cutting screws are the most common types of special parts we supply - this is a custom #10-12 X 1" phillips square combo drive thread cutting screw made in the USA using 302 stainless steel.  A type 17 point is incorporated to our customer's specifications and the parts are run through a black oxide and wax service as a final step.  These parts are stocked and releases on a blanket purchase order basis annually.

  • Special to Print Grade 5 Hex Head Cap Screw With Black Oxide Finish

    We supply approximately 20,000 pieces of this custom grade 5 hex cap screw annually on an as-released basis to our long time customer. The parts are made in the USA and measure 5/16-24 X 7/8. With the black oxide finish typical lead time for parts like this hex cap screw is approximately 5-6 weeks from order.


  • Special to Print Undercut Flat Head Machine Screw in 4037 Steel

    This is a special 1/4-28 X .571 dime slotted undercut flat head machine screw manufactured by a US based manufacturer we have worked closely with for more than two decades, made using 4037 steel and further processed with glass bead and rust inhibitor for optimal performance in our customer's application.  Parts like this typically carry a lead time of 6-10 weeks, depending on the secondary services involved and the quantity required.

  • Special Vented 8-32 X 5/8 Socket Head Cap Screw in Invar 36 Material

    This part is very much like the 6-32 X 1/4 vented socket cap screw shown in an earlier blog and this custom invar part was also purchased by a university research lab at a relatively small quantity. In quantities of 20-100 pieces the lead time for special socket cap screws with these parameters is approximately 1-2 weeks, with rush service available upon request.

  • Specialty O-Ring Sealing Machine Screws

    We provide our customer base a diverse array of specialty sealing screws like this 6-32 X 3/8 phillips pan head machine screw in 18-8 stainless steel with built-in buna o-ring. The sealing feature can be incorporated using a variety of different materials and methods, depending on the customer's specific requirements. We supply these specific screws to our customer on a revolving blanket purchase order basis.


  • Stainless Steel Special Button Socket Screw To Print

    We supplied just 15 pieces of this custom button head socket cap screw, made using 18-8 stainless steel to specifications provided by the customer.  The part measures 5/16-24 X 1 with a 1/2 dog point, with point diameter between .225 and .235.  Point length was constrained to .170-.150.  Engineered Source part number is A2300-0264.

  • Unslotted Hex Washer Head, Trilobular Thread Forming Special Screw in 410 Stainless Steel

    This is a custom trilobular part manufactured in the United States, which we provide to our customer on a annual blanket purchase order basis. The thread forming screw measures 10-32 X 1/2 and is made using 410 stainless steel, bright hardened and passivated. Finally the part is then run through the last secondary process of applying a thread sealant.


  • Vented Invar 36 6-32 X 1/4 Socket Cap Screws

    Small quantity special fasteners like this Invar 36 Socket Cap Screw measuring 6-32 X 1/4 are a perfect project us. Typically used by our customer for preliminary testing purposes, specials like this are produced by our long time trusted factory sources selected based on the exact quantity, material requested, and lead time required. These Invar 36 screws were purchased at 40 pieces and were shipped within 8 days of original order. Please think of us for any similar needs you may have!