Custom Stainless Shoulder Captive Screws - Cold Drawn 303 SS

 

These custom stainless shoulder captive screws were manufactured using cold drawn stainless steel bar stock material with a cold headed head and drive.  6-32 thread was incorporated at 5mm +/- 0.5, with a lead in chamfer per print.  The head was made to 8mm in diameter and 1.5mm in height, with the step shoulder measuring 3.6 in diameter by 2mm in length.  The long captive shoulder was set to 2.3mm +0/-0.2 diameter.  Overall length is 31.5mm and the head featured a #2 phillips drive.

Custom Captive Shoulder Screws - Flat Socket Head In 302HQ DFARS Material

Slightly over 4,000 pieces of these custom captive shoulder screws were made domestically for our aerospace customer.  An MS24671-32 part made using 302HQ DFARS compliant material was used as a base part to create this final version.  Part of the 1/4-20 3A thread was turned down to a shoulder diameter of .175" +/-.005 and length of .339" +/- .015.  .375" of thread remained after the modification.  The resulting captive shoulder screws were then passivated per AMS QQ-P-35 and run through a thread lock patch process per MIL-F-18240.