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 6220-00-274-8541
NSN 6130-01-535-2441
NSN 6130-00-850-6613
NSN 6240-00-522-3998
NSN 6110-00-263-6664
NSN 6645-01-649-8227
NSN 6150-01-187-1789
NSN 5925-01-077-9949
NSN 6135-01-246-0308
NSN 6685-01-041-4407
NSN 5975-00-730-3164
NSN 5835-00-392-2630