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 5835-01-128-9331
NSN 6240-01-516-0634
NSN 6320-00-937-5625
NSN 7035-01-116-5703
NSN 5960-00-140-9583
NSN 5910-00-202-1056
NSN 6320-00-682-3448
NSN 5905-00-826-6590
NSN 5855-01-557-9470
NSN 4140-00-059-8567
NSN 6220-01-386-1582
NSN 6105-01-188-1524