A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5985-01-127-1218
NSN 5990-01-097-4721
NSN 5965-01-505-9989
NSN 6620-01-017-8765
NSN 5855-01-317-5354
NSN 5915-01-546-2322
NSN 4140-01-411-5908
NSN 5935-01-023-5920
NSN 5935-00-086-9829
NSN 6610-01-558-1815
NSN 5925-01-359-6329
NSN 5990-01-468-1292