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 5965-01-177-4872
NSN 6620-01-426-1148
NSN 6610-00-925-3914
NSN 6220-00-719-7714
NSN 6110-01-481-9550
NSN 6150-01-485-3478
NSN 6145-01-065-9799
NSN 5930-01-575-8301
NSN 7035-01-469-5854
NSN 5920-00-194-4049
NSN 5930-01-081-9715
NSN 5999-01-408-4364