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 5999-00-729-5112
NSN 5935-00-075-2076
NSN 6110-01-176-7529
NSN 4140-00-238-9940
NSN 5965-00-387-6880
NSN 6320-01-145-9013
NSN 5950-01-454-6628
NSN 5996-00-021-5624
NSN 6135-00-274-4037
NSN 5925-01-227-9111
NSN 5855-00-147-2508
NSN 6130-01-383-0416