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 6685-01-177-9447
NSN 5998-00-299-7891
NSN 4140-00-214-0554
NSN 6650-01-588-2751
NSN 6650-01-317-0015
NSN 2925-01-164-4197
NSN 5935-01-268-6042
NSN 5835-00-761-5615
NSN 2925-01-494-3259
NSN 5985-01-503-0900
NSN 5965-01-127-0389
NSN 5990-01-492-6575