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 5945-01-555-3075
NSN 6320-01-618-7800
NSN 5950-01-503-3625
NSN 6620-00-302-5719
NSN 6610-01-258-7059
NSN 5996-00-373-9001
NSN 5935-00-499-9070
NSN 5925-01-217-0500
NSN 5835-00-813-1724
NSN 6105-01-401-5361
NSN 6620-01-423-2612
NSN 5990-00-944-7583