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 5915-01-264-7511
NSN 5855-00-256-5562
NSN 5935-00-010-7751
NSN 5925-01-554-0806
NSN 5835-01-416-6455
NSN 5905-01-534-5964
NSN 6650-01-540-5157
NSN 6105-01-278-9220
NSN 5998-00-087-4776
NSN 5996-01-433-4707
NSN 5945-00-185-6609
NSN 6685-01-182-8841