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 6620-01-452-4034
NSN 5855-01-033-1375
NSN 6110-01-537-6669
NSN 5930-01-368-8941
NSN 6150-01-578-1328
NSN 6130-01-423-8338
NSN 6685-01-559-3554
NSN 6685-01-487-3361
NSN 5985-00-526-3469
NSN 5998-01-564-2378
NSN 4140-00-230-4252
NSN 6240-01-075-4857