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 6220-01-510-7215
NSN 5990-01-503-6827
NSN 6145-01-072-3352
NSN 5920-01-548-0094
NSN 6135-01-322-4655
NSN 2925-01-316-0725
NSN 6620-00-155-2608
NSN 5996-01-477-2095
NSN 6240-00-488-0278
NSN 5965-01-222-1420
NSN 5920-01-471-9235
NSN 6650-00-153-3155