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 5895-00-021-0854
NSN 5855-01-542-9059
NSN 5915-01-340-0650
NSN 6620-00-075-6667
NSN 6105-01-206-1959
NSN 5930-00-599-6981
NSN 5930-01-433-6780
NSN 5996-01-337-5172
NSN 6130-00-153-3136
NSN 5965-01-518-9249
NSN 6610-01-023-6073
NSN 5998-00-984-6047