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 6645-01-149-2247
NSN 5930-00-597-1475
NSN 5999-01-424-1707
NSN 5998-00-269-5444
NSN 4140-01-151-2937
NSN 5935-01-504-3509
NSN 5925-00-605-6448
NSN 6685-01-634-0611
NSN 6130-00-208-2906
NSN 5975-01-352-3259
NSN 4140-01-395-9228
NSN 5985-00-962-1790