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 5950-01-633-6540
NSN 5835-00-275-0584
NSN 5950-01-537-4338
NSN 6105-00-864-2819
NSN 2925-00-567-3643
NSN 6150-00-437-8196
NSN 7035-00-523-7492
NSN 5920-01-186-9302
NSN 5920-01-471-9235
NSN 6145-01-364-0346
NSN 6135-00-269-5843
NSN 5895-01-032-4938