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 5925-00-676-1797
NSN 5930-01-155-7867
NSN 5935-01-177-1679
NSN 5930-01-467-2488
NSN 5910-00-824-5207
NSN 6620-01-321-7687
NSN 5935-01-634-0668
NSN 6685-00-175-6932
NSN 6320-01-264-4563
NSN 5920-00-968-6370
NSN 6110-00-062-5908
NSN 6320-00-557-3079