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 5935-00-452-9606
NSN 5855-00-149-0766
NSN 5996-01-219-6675
NSN 6150-01-080-9384
NSN 5975-01-160-0481
NSN 5998-00-018-0805
NSN 5920-01-519-2712
NSN 4140-00-248-5916
NSN 5999-00-096-2964
NSN 6220-01-300-8126
NSN 6320-01-312-0036
NSN 5999-00-248-3227