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 5945-00-233-6790
NSN 5960-01-106-0460
NSN 5990-01-304-7597
NSN 6320-01-259-2604
NSN 5965-01-147-5847
NSN 5990-01-116-2181
NSN 5990-00-285-0747
NSN 6650-01-468-7704
NSN 5915-00-244-1702
NSN 6645-01-649-5069
NSN 6110-01-612-7555
NSN 6110-00-040-0164