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 4140-01-033-7819
NSN 6320-00-306-0124
NSN 6130-01-351-9600
NSN 2925-01-244-3016
NSN 5925-01-554-9486
NSN 6610-00-553-5103
NSN 5920-01-584-3310
NSN 6150-00-557-7660
NSN 5835-01-504-0837
NSN 5930-00-959-3466
NSN 5920-01-030-1112
NSN 5930-00-010-8134