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 5930-01-449-2128
NSN 5915-01-227-6349
NSN 5935-00-110-7830
NSN 5930-01-309-8651
NSN 5975-00-927-7476
NSN 6110-01-422-1572
NSN 6145-01-098-7100
NSN 5835-01-029-1702
NSN 6150-01-290-5865
NSN 6220-01-395-4136
NSN 5990-01-189-3201
NSN 6110-01-147-7214