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 5996-00-220-3322
NSN 6105-00-726-8684
NSN 6685-01-430-2447
NSN 2925-01-354-1752
NSN 6240-01-245-2291
NSN 5990-01-328-8225
NSN 6320-00-082-5868
NSN 4140-01-203-4087
NSN 6130-00-518-4305
NSN 5920-01-297-4395
NSN 5935-00-227-7758
NSN 5895-01-322-5563