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 5920-01-445-5281
NSN 7035-00-349-8571
NSN 6130-01-513-6388
NSN 6150-00-285-6946
NSN 5950-01-183-5375
NSN 5950-01-602-8755
NSN 6650-00-103-9379
NSN 5855-01-343-2933
NSN 6150-01-503-1585
NSN 4140-01-600-6117
NSN 6135-01-578-8642
NSN 6650-01-195-3957