Home > Custom Aerospace Fasteners

Nothing is more exciting for our team than working on custom aerospace fastener projects. The parts themselves are typically very interesting and the application is always guaranteed to be fascinating. We are extremely proud to take a small but critical part in our customer's groundbreaking pursuits and accomplishments.


With both domestic and overseas production for almost three decades, we will develop the right plan based on the quantity, material, dimensional requirements, cash flow requirements, and lead time required for your specific parts. DFARS compliant materials, FAIR documentation, NADCAP certified processes, and a variety of quality test reports are made available when required.


CALL US WITH YOUR INQUIRIES AT (866) 243-3044 OR EMAIL US AT SALES@ENGINEEREDSOURCE.COM

  • Alloy Steel Set Screws With Nylon Strip - DIN913 M6 X 1M X 16MM Socket Set Screw With Flat Point

    DIN913 M6 X 1M X 16MM socket set screws with thread locking strip application.  Samples were provided to our customer for testing of thread locking feature prior to running the full volume.  

  • AN126288 Straight Stud Special Made for Aerospace Application

    This is a dual threaded straight stud made to AN126288 specifications, with one side at 5/16-24 thread pitch and the other at 5/16-18 non standard pitch.  We supplied this part to our aerospace customer at approximately 300 pieces per order.  AMS 6322 steel was used as the material, heat treated to 26-32 rockwell hardness and Cadmium plated to AMS 2400 specification.  Material, heat treat, and plating certs were provided with the parts.

  • AN815-4K Union Flared Tube Fitting for Aerospace Applications

    Engineered Source is a supplier of custom made fittings like these AN815-4K fittings we had produced for our long time aerospace customer. Lead times vary depending on the part, material, and volume but typically range from 6 to 10 weeks.


  • Blue Coated Aerospace Hardware - 1/4" Shoulder Screw In Alloy Steel With Alumazite KL-55 Blue Coating

    This is an example of blue coated aerospace hardware we supply, with a 1/4 diameter shoulder screw in alloy steel coated with Alumazite KL-55 blue finish.  The blue coating was intended to allow an robotic color coded system to recognize the screw and yet maintain its integrity in environments up to 600 degrees F.  The coating is also intended to limit any risk of off-gassing and usability of the hex socket drive.  Only the head is coated to avoid the complications of having any coating on the shoulder and threaded surfaces.

  • Custom 4140 Flat Socket Head Screws - Custom 1/4-28 X .595" Flat Socket Screws For Aerospace Applications

    These custom 4140 flat socket head cap screws were produced domestically for our aerospace customer using AISI 4140 alloy steel material per AMS 6349.  Heat treat to 160-180 ksi per AMS 2759 was performed to finalize the production process.  Magnetic particle inspection per ASTM 1444 (Type I, Meth A, Sens Lev 3) was performed after the machining process was completed.  Lead time for this part varies significantly based on how busy the manufacturing and testing facilities are at the time of start.

  • Custom A286 MS24693 Screws - Phil Flat 4-40 X 1/4"

    These custom A286 MS24693 crews can look deceivingly simple at first glance. The A286 material was a large deviation from the typical MS24693 specifications and the parts had to be heat treated to 140 KSI. To finish off the production process the parts went through a NADCAP certified sand blast and descale & passivation process per AMS2700 Type 2 Class 1. The production consisted of approximately 50,000 pcs and was completed domestically. NACAP cert for the passivation was provided together with material cert and certificate of conformance.


  • Custom Aerospace Socket Head Cap Screws - 8-32 X 4.25" In 18-8 Stainless Steel Material

    We supplied 54 pieces of these custom aerospace socket head cap screws to our long time customer. They were made in the USA using 18-8 stainless steel material (no DFARS requirement on these) with a broached 9/64" hex socket drive with min .077" engagement depth. 1" of the overall 4.25" length under the head was threaded at 8-32. Due to the smaller quantity required the thread was cut rather than rolled. Material certs and a certificate of conformance was provided but no FAIR was required for this specific part.


  • Custom Aerospace Socket Screws - NA0069A040046 Socket Head Cap Screws in 1250 MPA A286 Material

    These are custom aerospace socket screws we had domestically produced for our aerospace customer at 50 pieces.  The trickiest part was the 1250 MPA requirement that our customer insisted on, which is a deviation from the standard NA0069A040046 specification.  We were able to supply the custom part faster than our original promise date at approximately 3 weeks from order receipt.  M4-0.7 thread was incorporated and test results confirmed 39-40 HRC after AMS 2759/3 Rev. F heat treat process.  NADCAP certified passivation per AMS-2700 was also performed and all certifications were provided to our customer with the parts.

  • Custom Dimensional MS16218-9 Slotted Flat Machine Screw

    Customers often ask us to supply them dimensional equivalents of MS and AN milspec parts with a varying degree of documentation and testing requirements. This is a small quantity (1,000 pieces) batch of special made dimensional equivalent of MS16218-9 slotted flat machine screws, made in the USA using C65500 ASTM B 98 silicon bronze material - it measures 2-56 X 3/16".


  • Custom Drilled Socket Head Cap Screws In 17-4 PH, AMS 5643 Material

    These are custom drilled socket head cap screws we supplied our customer that specializes in aerospace parts repair.  They are made domestically in the USA using 17-4 PH/AMS 5643 material with AMS 2759/3, H1100 (30-37 Rc) heat treat, heavy medium sand blast, and finally passivation.  The socket head is drilled in four places at 60 degrees between each pair, using a #56 drill bit at .0465" diameter.  The length is set at .635-.615 inches and the 8-32 UNJC-3A threaded section is to be maintained at .510 to .490 inches.

  • Custom Drilled Stainless Steel Socket Set Screw

    This is a custom made to print socket set screw made using 303 stainless steel, passivated to Mil QQ-P-35 Type II.  It measures 10-32 X .415" +/-.010 and is drilled at a diameter of .126 +.005/-.000 to a depth of .250 +/-.005.  We supply them at orders of approximately 1,000 pieces per release and the custom parts are made domestically in the USA.

  • Custom Knurled Shoulder Machine Screws Made To Print - 1/4-20 X 1-1/4 Round Head In Grade 5.1 Zinc Yellow

    These are custom knurled shoulder machine screws manufactured domestically in the USA in grade 5.1 steel material with zinc and yellow finish. Production was run at a relatively small quantity of 4,000 pieces, which was split into two shipments approximately 4 months apart to our OEM customer. Material certs and dimensional test reports were provided to our customer with the parts, as well as the standard certificate of conformance. Our internal part number is M111957-2.

  • Custom Large Socket Cap Screws For Aerospace Applications - 1-1/4 -7 X 9 Inches In A574 Material With Black Oxide Finish

    A574 material was used for these custom socket cap screws, with minimum tensile strength of 170,000 psi, minimum yield strength of 154,000 psi, and rockwell hardness between 37 and 45.  1-1/4 -7 class 3A thread was required and the overall length underneath the head was 9 inches.  MIL-DTL-13924 black oxide finish was done to complete the parts.  Per their request the shank and threads of each socket screw had to be protected during handling and shipping.

  • Custom Machined Double End Studs For Aerospace Applications - 630 (17-4) AMS 5643T Material With a Drilled Hole Per Print

    These are custom machine double end studs used for aerospace applications and in our case specifically for helicopter repair.  17-4 material is used and the 10-32 UNJF-3A thread is cut after the drilled hole process and machined operations are completed.  A 3/32 hex recess with a .225" deep cavity is created on one side using a drill and broach approach.  The drilled hole on the single threaded side measures .035 in diameter.

  • Custom Metric Invar 36 Screws - M3-.5M X 10MM Socket Head Cap Screws

    These are custom metric Invar 36 screws that we supply the University of Montreal in Canada at approximately 50 pieces per order. They are manufactured domestically in the United States with a lead time of 2 weeks and are provided with all required certifications.

  • Custom Metric Invar Screws - M2.5 X .45M X 8MM Socket Head Cap Screws in Invar 36 Material

    These are the other version of the custom metric invar screws that we supply to the University of Montreal, typically at approximately 50 pieces per order.  Plain invar 36 material is used for the domestic production of the parts and lead time typically ranges from 2 to 3 weeks from confirmed order placement.  Material certs, FAIR, and certificate of conformance are available with the parts upon request.

  • Custom Modified Socket Head Screws - M4 - 0.7 X 14MM Socket Head Captive Screw in Alloy Steel Material

    These are custom modified socket head cap screws in alloy steel material.  Standard off the shelf M4-0.7 X 14MM socket head cap screws were modified to allow their use as captive screws with partial thread and modified head dimensions.  The ground shoulder area measures 8.80MM +/- 0.3MM in length and a dimater of 3.30MM +/- 0.15MM.  The head was modified to a diameter of 5.50MM +/- 0.15MM and a height of 4.0MM.  Material certs and a certificate of conformance was provided with the parts per customer's specifications.

  • Custom Slotted Fillister Screws - 303 Stainless Steel, DFARS Compliant

    Custom slotted fillister screws we supplied to our aerospace customer at 100 pieces - ASTM A582 DFARS compliant 303 stainless steel material (Italy Melt) was used for the domestic manufacturing.  2-56 thread was incorporated at .25-.37" in length, with the overall length underneath the head at .625 +0/-.030".  The head height measures .070-.095" and the slot depth is set at .033-.043".  Head diameter was set between .145" and .161".  Full certs were provided with the parts per our customers usual requirements.

  • Custom Stainless Aerospace Pins - One Side Chamfered In Stainless Steel Material

    These are custom stainless aerospace pins we supply on a production to order basis.  Only one side is chamfered to the customer's requirements and the custom parts are run through passivation prior to shipment.  They measure .310 at the diameter and 3" +/.02 in length.  To the customer's specifications, these custom pins are manufactured in the United States and material certs are available upon request.

  • Custom Stainless Steel Socket Cap Screws In 303 Stainless Steel - 8-32 X 4-1/2"

    These are custom stainless steel socket cap screws made domestically using 303 stainless steel at just 102 pieces.  We supply this part to our long time aerospace customer approximately once a year with full paperwork.  It measures 8-32 X 4-1/2 and had a relatively short lead time of 1 week for production.  Our internal part number is SC-008068-I.

  • Custom Vented Titanium Screws - 2-56 X 7/8 Socket Cap Screws In Grade 5 Titanium Material, Vented

    These custom vented titanium socket cap screws were made domestically in the USA using ASTM B348 Grade 5 material and measured 2-56 X 7/8".  The vent hole has a diameter of .028 inches.  Lead time for similar parts is typically 8-10 weeks but expedited options are typically available upon request.  Our internal part number for this vented screw is SC-002014-UVENT.

  • NAS 1351C4H16 Aerospace Socket Head Cap Screws - 302HQ Material

    These are special made NAS 1351C4H16 aerospace socket head cap screws in 302HQ stainless steel material. They are manufactured domestically within the USA using DFARS compliant material with production running at typically 50,000 to 60,000 pieces. We supply these NAS socket screws to our long time aerospace customer at revolving annual blanket purchase terms. 1/4-28 UNRF-3A thread to MIL-S-7742 thread specification is incorporated and a minimum hardness of 80 HRB is maintained. All applicable certifications are provided to our customer with each release.


  • NAS-1352C02-3P Socket Head Cap Screws In Cad Plated Alloy Steel

    This is one of the cadmium plated NAS parts we carry on an annual blanket purchase order basis for our customer. This NAS1352C02-3P socket head cap screw is made domestically and is supplied with material certs and certificate of conformance. Alloy material per FF-S-86 is used with cad plating in accordance with AMS-QQ-P-416, Type II, Class 2.


  • Nylon Pellet Set Screws For Aerospace Applications - 8-32 X 1/2 Socket Set Screw With Cup Point in 18-8 Stainless Steel

    These are specialty nylon pellet set screws we supply our long time aerospace customer on scheduled release blanket purchase order basis. The cup point set screws are made in the USA using 18-8 stainless steel material and are then run through the nylon pellet secondary operation. Our customer using approximately 500 pieces every six months and the lead time to prepare the initial shipment for these nylon pellet set screws is typically 1-2 weeks from order. Our internal part number is SSC-0808-INPELL.

  • Precision Custom Stainless Steel Dowel Pins - .1160 X .625 Made to Customer's Drawing

    This is a small batch of custom stainless steel dowel pins manufactured domestically in the USA at just 36 pieces.  303 stainless steel was used and the custom dowel pins measure .1160 at the diameter by .625 inches in length.  The diameter was the most critical dimension with a tolerance of +/-.0001".  Both sides were chamfered at .010 X 45 degrees and +/-.005 tolerance was called for on the length.  We were able to get production completed and parts shipped in less than 2 weeks from order confirmation.

  • Special 1/16 X 7/16 Coiled 302 Stainless Steel Spring Pin, DFAR Compliant

    These US made spring pins are manufactured using 302 stainless steel and are available with full documentation to our customer. They are passivated, DFAR compliant, and we get them cadmium plated (with NADCAP certification) prior to final shipment preparation. A variety of alternative sizes and specifications are also sourced consistently.


  • Special 1/72 Hex Machine Screw Nut In 303 Stainless Steel

    This is a tiny 1/72 hex machine screw nut we supply to our aerospace customer on a blanket purchase basis.  It is made using 303 stainless steel domestically in the United States and is supplied as passivated by the original manufacturer and separately as passivated by a NADCAP certified facility in Orange County.

  • Special 2/56 X 3/8 Socket Cap Screw in 18-8 Stainless Steel, Cadmium Plated

    Engineered Source has supplied this part for many years on a blanket order basis - the part is a special to print socket cap screw measuring 2/56 X 3/8 and is manufactured in the United States using 18-8 stainless steel material. Secondary service of cadmium plating with NADCAP certification is applied to finalize the cap screws for their end use. Internal part number for this socket cap screw is SC-002006-ID.


  • Special 5/8-18 Nickel Plated Palnut For Aerospace Applications

    This is a 5/8-18 palnut that we supply on a blanket purchase order basis to one of our aerospace customers. Per their specific specifications we have the plain steel version of this part nickel plated to QQ-N-290, with copper strike. Parts go through a 5 hour pre-bake process and also an 8 hour post-bake process at 375 degree Fahrenheit. To our customer's request all passivated and plated parts are shipped with a NADCAP cert.


  • Special 6-32 X 3-1/2 Slotted Round Machine Screw in Plain 1022 Carbon Steel

    We supply this part to our aerospace/defense customer after having it cadmium or zinc plated, typically at quantities between 1,000 and 3,000 pieces. This part is made in the USA and is provided with full certs, including DFAR, material, FAIR, and Certificates of Conformance. Lead time is typically 6-8 weeks from order and if needed an updated drawing can be provided for final approval prior to production start.



  • Special 6/32 X .393 +/-.020 Socket Shoulder Screw in SAE Grade 2 Steel, Black Phos & Nylon Patch

    This is a special socket shoulder screw manufactured in the United States using SAE grade 2 steel material with black phosphate finish.  A nylon patch process is run on the parts to finalize them for use in our customer's application.  We carry these parts on a blanket purchase order basis and typically stock 6-12 month supply for our customer's immediate production needs.

  • Special DFAR Compliant Machined Elbow Fitting

    Engineered Source has been supplying custom machined fasteners and related products since inception, creating a strong network of quality manufacturers that have consistently proven their value in quality and timely delivery.  DFAR compliant fittings like this are a common item we distribute, with any specific certifications requested by the customer.

  • Special Inconel Rolled Pin

    We supply a number of version of this special pin made using Inconel alloy C-276 material in the USA. The part is stocked and released as needed to our long time customer. The inconel materal is hot rolled, pickled, and annealed - the final pins shown here measure 1/16 X .850".


  • Special NAS9921C5B20F & NAS9921C5B19F Shear Bolts

    As you can see in the print below, which continues for another 4 pages of specifications, these shear bolts are a tough part to make. 5/16-24 thread pitch is used for the threaded section, with a thread locking patch. A286 material is used to make the part, with heat treat and passivation per AMS 2700. We supplied the customer 6 pieces of each part, made specifically for their order and specifications.


  • Specialty 50FM-172 1/72 Flexlock Hex Nuts Supplier

    This is a special flex lock hex nut with a locking machined shoulder we supply to our aerospace customer on a 12 month blanket as-released purchase order basis. It is made in the USA in plain 303 stainless steel material and we supply it with full documentation, including signed C of C, DFAR material cert, and dimensional test report. Our internal part number for this item is 50FM-172.


  • Specialty MS20426AD3-4 Solid Rivet In Anodized Aluminum Material

    We supply a large variety of milspec hardware to our aerospace and defense customer base and this is one of the solid rivets we supply on an annual blanket purchase order basis.  It is a domestically made MS20426AD3-4 solid rivet made using aluminum material finished with chemical film per MIL-DTL-5541F Type 1 Class 1A.

  • Specialty MS21209F1-10 Helicoil Thread Inserts On A Strip Feed Wheel

    We supply our aerospace customer base with a large variety of thread inserts like this MS21209F1-10 on a strip feed wheel for greater efficiency and convenience.  Both standard off the shelf variations and custom made to print thread inserts are available with typically short lead times.  We can supply any parts with annual volume exceeding $1,000 on a 12 month blanket purchase order basis.  All paperwork is available with the parts upon request.