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 6620-01-385-6172
NSN 7035-01-146-1578
NSN 5895-00-888-4719
NSN 6135-00-405-1989
NSN 6650-00-455-9457
NSN 6150-01-388-2421
NSN 6320-00-445-1187
NSN 6685-01-359-9166
NSN 5895-00-071-9742
NSN 5945-01-165-2054
NSN 5965-00-136-9623
NSN 6150-01-287-9643