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 5915-01-414-2782
NSN 6650-00-820-4577
NSN 6240-01-170-3491
NSN 5999-01-098-6469
NSN 5855-01-386-7323
NSN 5990-01-218-5160
NSN 6135-01-113-1507
NSN 6645-01-177-6021
NSN 5998-00-008-2036
NSN 5990-01-546-1649
NSN 6650-01-392-6076
NSN 5945-00-269-5375