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 2925-00-240-7820
NSN 5990-01-432-4249
NSN 6685-01-319-8195
NSN 5985-01-138-8305
NSN 6645-00-133-7823
NSN 6110-00-012-5514
NSN 4140-01-406-3626
NSN 6110-01-248-3701
NSN 5960-01-544-1273
NSN 5920-00-434-0981
NSN 5985-01-371-5512
NSN 6620-01-203-4369