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 6685-01-334-3968
NSN 5935-01-599-1991
NSN 4140-00-446-1024
NSN 5990-01-237-7188
NSN 6135-01-633-8502
NSN 5985-00-683-2188
NSN 5998-00-951-3218
NSN 6220-01-237-2488
NSN 5996-00-883-2051
NSN 6650-01-528-2848
NSN 5950-01-257-2899
NSN 6650-00-111-1081