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 4140-00-005-4574
NSN 5920-01-094-7284
NSN 5925-00-060-6732
NSN 5975-01-488-4462
NSN 5985-01-016-3831
NSN 7035-01-364-0286
NSN 7035-01-443-3052
NSN 5990-00-226-1152
NSN 2925-01-064-3729
NSN 7035-01-003-9142
NSN 5985-01-280-8308
NSN 6135-01-408-0313