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 5935-00-555-1897
NSN 6220-00-847-9560
NSN 5925-01-496-0701
NSN 6110-01-420-0808
NSN 5930-00-141-5975
NSN 6150-01-104-7068
NSN 5905-01-589-8112
NSN 5990-01-434-7913
NSN 5975-01-290-3717
NSN 5855-01-364-4478
NSN 5895-00-561-1209
NSN 5895-00-691-6299