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 6145-00-515-6931
NSN 6650-00-299-9681
NSN 5998-00-907-3128
NSN 5920-01-291-4056
NSN 7035-01-577-5705
NSN 6320-00-506-2314
NSN 6620-01-432-7032
NSN 5935-01-427-3822
NSN 5999-00-760-7128
NSN 7035-00-968-4848
NSN 5999-01-188-8001
NSN 5945-00-407-4545