A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6135-01-475-7415
NSN 5999-01-437-5732
NSN 6130-00-494-7332
NSN 5920-01-646-9593
NSN 6150-00-627-1495
NSN 5945-00-597-4599
NSN 5965-01-095-9767
NSN 5965-00-879-7287
NSN 5950-00-760-7230
NSN 4140-01-083-5870
NSN 5945-00-311-5812
NSN 5965-01-229-0786