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 5990-01-159-5988
NSN 6645-01-432-0052
NSN 5935-01-536-8180
NSN 5998-01-375-0407
NSN 5999-01-616-5504
NSN 5998-00-312-3060
NSN 5985-00-802-7658
NSN 6650-01-357-7229
NSN 6240-01-566-8474
NSN 5935-01-595-5636
NSN 5990-01-378-7349
NSN 2925-01-197-7864