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 4140-00-900-6102
NSN 6220-00-926-1331
NSN 5999-00-131-4506
NSN 5910-01-059-7499
NSN 5985-01-416-6439
NSN 5998-00-088-8450
NSN 5920-00-940-0401
NSN 5975-01-109-6663
NSN 5990-00-100-6643
NSN 6645-00-023-8386
NSN 5998-00-269-5444
NSN 5945-01-553-4102