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 5960-01-101-9029
NSN 5855-01-537-0499
NSN 6620-01-448-0572
NSN 6220-00-884-0769
NSN 5910-01-055-6719
NSN 6110-00-598-2574
NSN 5835-01-371-8759
NSN 5985-00-985-3939
NSN 4140-00-541-9077
NSN 5975-00-150-6400
NSN 5905-00-153-2134
NSN 5945-00-615-2789