This is a custom shoulder u-bolt we supplied to our construction customer. They were manufactured domestically using plain steel material, using 1/2 bar stock. The threaded sections however needed to be 3/8-16 at 1.3125 lengths on each leg. The unthreaded shoulder portion measures .750 inches in length and the centered width between the legs is 2 inches. Our internal part number for this part is SUB37061-A.