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 6145-01-439-9548
NSN 5930-00-982-6885
NSN 5935-01-428-4115
NSN 6620-00-635-2417
NSN 5910-00-465-4518
NSN 6320-00-483-0451
NSN 5950-01-084-1005
NSN 5835-01-012-1436
NSN 5930-01-262-0172
NSN 6220-01-298-4581
NSN 4140-00-358-9965
NSN 5915-00-167-0306