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 5905-01-592-5517
NSN 6620-01-633-8443
NSN 6110-01-148-7655
NSN 6220-00-803-7041
NSN 5835-00-005-7909
NSN 5930-00-880-9878
NSN 5960-01-058-8582
NSN 6320-01-629-1277
NSN 5960-01-380-9692
NSN 4140-00-456-6139
NSN 6145-00-054-0499
NSN 5930-01-413-9506