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 4140-01-519-9343
NSN 6240-01-608-4990
NSN 5950-01-564-1151
NSN 5950-01-095-8914
NSN 5950-01-466-0366
NSN 6110-00-491-6874
NSN 6135-01-561-5945
NSN 5935-01-044-5741
NSN 6135-01-290-6487
NSN 6145-00-330-9578
NSN 6150-00-106-4134
NSN 5960-00-517-9359