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 5965-01-612-1537
NSN 5975-00-959-8304
NSN 5835-00-170-5238
NSN 7035-01-260-0804
NSN 4140-00-262-9921
NSN 6150-01-445-5920
NSN 6220-01-502-9451
NSN 5998-01-198-6941
NSN 5960-00-536-1535
NSN 5905-01-344-3857
NSN 5945-00-800-9282
NSN 5915-01-344-6525