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 6220-00-358-9580
NSN 5999-01-468-1549
NSN 6110-01-605-0144
NSN 6150-01-415-4567
NSN 5835-00-998-5757
NSN 4140-01-547-3947
NSN 6240-01-482-3999
NSN 5985-00-554-9730
NSN 5945-01-624-0305
NSN 5920-00-144-8031
NSN 6145-01-236-5686
NSN 5998-00-758-7266