A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 4140-01-274-4762
NSN 5945-01-135-2227
NSN 6650-01-253-6794
NSN 6110-00-776-5961
NSN 6220-01-564-0094
NSN 7035-00-104-7613
NSN 6685-01-339-7696
NSN 5920-01-529-7697
NSN 5945-01-483-1316
NSN 5855-01-175-2465
NSN 6240-01-013-8895
NSN 6105-00-473-5785