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 6240-00-577-8456
NSN 6145-01-091-4652
NSN 6320-00-857-4073
NSN 6220-00-781-0451
NSN 5910-01-129-4162
NSN 5835-00-830-6416
NSN 6110-00-257-5199
NSN 6135-01-514-5358
NSN 4140-00-597-5260
NSN 5996-01-420-5756
NSN 5996-01-599-9867
NSN 2925-01-014-8007