We had 100,000 pieces of these custom full thread hanger bolts produced in grade 5 steel material per SAE J429 with zinc clear finish. The overall length was at 3-1/2 inches with 1-1/2 inches of 5/16-18 machine screw thread. The balance was rolled with 5/16-9 wood screw thread. No unthreaded shoulder was incorporated with the parts per our customer's drawing requirements.
These custom long 316 stainless steel screws were manufactured domestically using a broached socket drive and cut threads to allow for the fast production turnaround required on the project. The 316 stainless steel raw material was required to be DFARS compliant. 8-32 thread was incorporated at a length of approximately 1-1/8" and overall length underneath the head is 6". All dimensions outside of the thread length were done per standard IFI dimensions. Full certs were provided with the parts per customer request.