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 6650-01-175-0841
NSN 5920-01-359-8720
NSN 5945-01-347-7750
NSN 5935-00-253-1279
NSN 6650-01-618-0680
NSN 5990-01-388-0252
NSN 5996-01-447-0846
NSN 6320-01-172-6103
NSN 6110-00-683-1022
NSN 5930-01-027-0523
NSN 5999-01-072-3131
NSN 5996-01-101-4673