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 5935-01-349-9918
NSN 6135-00-983-9187
NSN 5925-01-429-0392
NSN 5915-01-020-6509
NSN 5915-00-186-0463
NSN 5925-01-073-9736
NSN 7035-01-388-6943
NSN 6105-01-212-2142
NSN 5985-01-482-1768
NSN 6650-01-496-2662
NSN 5999-01-125-6698
NSN 5930-01-627-3925