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 5935-01-203-6117
NSN 6620-01-067-8336
NSN 5920-01-373-4629
NSN 6650-01-647-9482
NSN 5930-00-456-0889
NSN 5915-00-074-0142
NSN 5915-00-617-9477
NSN 6130-01-649-7566
NSN 6145-00-317-2087
NSN 5855-01-568-1532
NSN 5998-01-055-0425
NSN 6110-01-284-0318