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 5945-01-256-3148
NSN 5905-00-872-6383
NSN 5990-00-170-4239
NSN 5920-01-340-2639
NSN 6320-00-450-7014
NSN 5935-00-301-1039
NSN 5965-00-242-0001
NSN 5905-00-281-2329
NSN 6620-00-810-6774
NSN 6645-01-644-8376
NSN 5999-01-258-5930
NSN 5999-01-654-9504