A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 5998-01-652-1990
NSN 6620-00-017-3901
NSN 5855-00-560-0110
NSN 5999-00-225-8612
NSN 5855-00-494-9581
NSN 5999-01-421-2692
NSN 5990-01-212-2037
NSN 5965-00-996-3541
NSN 5965-00-532-3284
NSN 5905-01-474-5173
NSN 6620-00-946-4864
NSN 5975-01-365-0127