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 5998-01-256-7132
NSN 6320-01-046-5228
NSN 5925-00-718-7530
NSN 5910-00-288-0420
NSN 6240-01-432-0819
NSN 5999-01-634-0576
NSN 6610-00-337-5483
NSN 6145-00-299-6417
NSN 7035-01-403-2841
NSN 6145-01-453-9191
NSN 5915-01-161-0719
NSN 5920-00-456-5211