These custom long socket head machine screws were manufactured domestically using 4140 alloy steel material with heat treatment to reach 37-44 Rc hardness. Two sizes were produced together in this run: 8-32 X 5.43" length with thread length of 5/8" and 8-36 (an odd thread pitch requested for this one) X 6-3/8" with the same 5/8" thread length requirement. The thread was cut rather than rolled for these parts and the hex drive was broached.
We had 64 pieces of these custom large B7 threaded studs manufactured for our customer, with the cut and chamfer of the plain parts done domestically followed by commercial zinc + clear plating operation. The threaded studs measured 1-1/5 - 8 X 6-1/4 and were supplied with ASTM A194 2H heavy hex nuts. The cut and chamfer operation was relatively easy and quick but the zinc plating process took approximately 2 weeks to complete. Rush processing is available if a quicker turnaround is ever required.