A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5895-01-239-4955
NSN 5945-01-275-1493
NSN 5905-00-255-2482
NSN 6110-01-646-6227
NSN 6220-01-179-6242
NSN 5905-01-048-6542
NSN 5835-01-138-4747
NSN 5925-01-437-5725
NSN 5920-01-598-3282
NSN 6645-00-269-2764
NSN 5930-00-539-7149
NSN 6645-01-306-7376