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 5998-01-347-1976
NSN 6240-00-059-7099
NSN 6620-01-147-0441
NSN 5920-01-441-2481
NSN 5945-01-572-5702
NSN 5999-01-548-3069
NSN 5920-01-119-1896
NSN 6240-01-619-8316
NSN 5915-01-529-9418
NSN 5996-00-661-1151
NSN 5945-01-647-3839
NSN 5905-00-205-9796