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 6610-00-757-2914
NSN 5996-00-976-1429
NSN 5915-00-948-2900
NSN 5998-00-227-1873
NSN 5965-01-282-6085
NSN 6620-01-007-1057
NSN 6135-00-120-1034
NSN 5915-00-819-3653
NSN 6130-00-416-6592
NSN 6135-01-437-6409
NSN 6220-01-070-0826
NSN 6150-01-431-8617