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 6145-00-150-5049
NSN 6135-01-513-1515
NSN 6110-01-013-0551
NSN 4140-01-275-4422
NSN 5910-01-364-2828
NSN 7035-01-063-0453
NSN 5950-00-104-9999
NSN 6650-00-304-6987
NSN 6135-01-210-8715
NSN 5920-01-383-7108
NSN 5835-01-136-3394
NSN 6320-00-405-2348