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 5975-01-487-1974
NSN 5960-01-282-2386
NSN 6130-01-310-9465
NSN 5990-00-351-5479
NSN 6320-00-036-3688
NSN 7035-01-563-4801
NSN 5975-01-409-1369
NSN 6645-01-324-1956
NSN 6645-01-083-2001
NSN 5930-00-977-3532
NSN 5935-01-178-0972
NSN 6145-00-799-1125