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 5855-01-273-0927
NSN 6150-01-495-2348
NSN 6320-01-449-1014
NSN 6220-01-065-3765
NSN 6320-01-138-0442
NSN 6610-01-657-5532
NSN 6240-01-383-1576
NSN 5990-00-179-2576
NSN 6105-01-333-3983
NSN 7035-01-338-9971
NSN 5996-00-348-3844
NSN 6110-01-653-6139