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 6650-01-506-0386
NSN 6135-01-592-4139
NSN 5985-01-298-1445
NSN 5855-01-464-3152
NSN 5960-01-531-9108
NSN 5920-00-960-7614
NSN 6620-00-932-4306
NSN 6240-00-110-9414
NSN 5990-00-162-7273
NSN 5985-00-279-9914
NSN 5999-01-423-6268
NSN 5935-01-554-5795