MIL-S-45909C
MIL-S-45909C, MILITARY SPECIFICATION, STUD, LOCKED IN, RING LOCKED, SERRATED, GENERAL SPECIFICATION FOR (27 MAR 1989) ., This specification covers the requirements for locked-in studs. The method of locking the stud is by means of a serrated collar and an accessory lock ring with matching serrations installed within a parent material to prevent rotation.
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