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 6150-00-410-3301
NSN 4140-01-106-2559
NSN 6685-01-235-8387
NSN 5930-00-768-3410
NSN 5975-01-602-5839
NSN 5855-00-256-5562
NSN 5920-00-613-3116
NSN 5915-01-535-5396
NSN 5990-01-411-5930
NSN 7035-01-449-4668
NSN 5905-01-057-8115
NSN 5975-01-100-1063