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 5835-00-126-2961
NSN 5999-00-861-5494
NSN 5930-00-622-0854
NSN 5920-00-701-1200
NSN 6320-01-260-7390
NSN 6130-01-142-2436
NSN 6130-01-339-8011
NSN 5855-01-057-7818
NSN 5935-00-211-0552
NSN 5975-01-030-6933
NSN 5855-01-161-8964
NSN 6150-00-317-5498