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 6685-01-400-4192
NSN 6650-01-150-8101
NSN 6685-00-822-9465
NSN 5999-00-090-7008
NSN 6145-01-107-7370
NSN 4140-00-935-5360
NSN 6320-01-029-4220
NSN 5945-00-991-9003
NSN 2925-01-502-5896
NSN 6220-01-270-1454
NSN 5920-01-199-5522
NSN 5950-01-569-7795