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 5905-01-229-3920
NSN 4140-00-707-5963
NSN 6135-01-485-4512
NSN 6150-01-513-9553
NSN 6610-01-331-6966
NSN 6135-01-512-8740
NSN 6650-01-052-2143
NSN 5935-01-550-9471
NSN 5935-01-388-2066
NSN 6220-01-551-0833
NSN 5835-00-453-9752
NSN 5835-01-152-9483