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 6645-01-051-7447
NSN 6135-01-408-0313
NSN 5915-00-019-1741
NSN 5945-00-676-3687
NSN 6320-00-149-7570
NSN 5990-01-419-0661
NSN 6645-01-633-1852
NSN 5960-00-816-9040
NSN 6220-00-594-8817
NSN 6320-01-384-3850
NSN 7035-01-074-7634
NSN 5935-00-069-8500