A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 4140-01-250-4896
NSN 5998-01-285-6715
NSN 6320-00-284-1524
NSN 5935-01-025-9705
NSN 6220-01-420-1856
NSN 6650-00-371-0884
NSN 7035-00-104-7613
NSN 4140-01-344-7135
NSN 6610-01-165-3750
NSN 7035-01-186-0024
NSN 5920-01-625-9604
NSN 5935-00-962-2922