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 6320-00-164-4087
NSN 5996-01-625-7669
NSN 6610-01-189-3001
NSN 5965-01-184-2477
NSN 5835-01-519-2916
NSN 6650-01-461-7713
NSN 6320-01-119-3935
NSN 6320-00-456-0836
NSN 6145-01-447-4860
NSN 5990-01-017-3590
NSN 6240-01-491-6118
NSN 5925-01-167-7747