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 6645-01-364-0867
NSN 6650-01-250-1244
NSN 6150-01-462-1622
NSN 4140-00-238-9940
NSN 5895-01-519-7556
NSN 6220-00-781-0451
NSN 5998-00-293-6286
NSN 6105-00-248-5772
NSN 2925-01-579-8620
NSN 6220-00-935-1460
NSN 6320-00-646-3311
NSN 6135-00-583-3966