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 5920-01-145-4979
NSN 5925-00-255-2048
NSN 5990-00-959-2514
NSN 5905-01-546-1248
NSN 5895-00-626-9031
NSN 5945-01-522-6370
NSN 5965-01-509-2873
NSN 2925-00-246-3077
NSN 5925-00-945-9955
NSN 5996-01-445-5528
NSN 6145-01-100-4921
NSN 5915-01-019-6598