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 5950-01-446-2984
NSN 5965-00-768-4366
NSN 6645-00-880-8045
NSN 5998-01-446-3004
NSN 7035-01-116-5703
NSN 5920-00-040-2923
NSN 5915-01-418-1843
NSN 5985-01-232-3108
NSN 5990-01-465-9235
NSN 2925-01-587-3956
NSN 7035-01-085-9427
NSN 5975-00-715-3710