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 5935-01-612-7021
NSN 5915-01-246-8571
NSN 6130-00-297-5793
NSN 5935-00-265-0705
NSN 5835-00-435-6638
NSN 4140-01-213-7438
NSN 5915-01-424-0767
NSN 5985-01-540-4128
NSN 5996-01-612-9318
NSN 5925-00-837-9467
NSN 5895-01-534-7798
NSN 5950-00-397-9869