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 5835-01-507-0731
NSN 4140-01-431-9065
NSN 6150-00-506-9159
NSN 6610-01-006-3255
NSN 6685-00-155-4301
NSN 7035-01-018-9629
NSN 5920-01-198-9468
NSN 5835-00-894-7374
NSN 6620-00-109-5607
NSN 6320-01-054-3046
NSN 5999-01-424-9462
NSN 5915-00-206-0086