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 5915-00-215-2721
NSN 2925-00-964-7128
NSN 5835-01-310-8979
NSN 6650-01-101-9023
NSN 5835-01-177-1092
NSN 6135-01-571-7488
NSN 5835-01-143-9143
NSN 6240-00-456-2578
NSN 5930-01-472-3532
NSN 5998-01-219-7097
NSN 5945-01-384-4388
NSN 6135-01-202-8113