A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6320-01-425-1417
NSN 5925-01-072-3867
NSN 5990-00-189-6649
NSN 5930-00-859-0665
NSN 6130-00-352-2317
NSN 6105-01-026-0165
NSN 5965-01-569-0696
NSN 6130-00-721-4156
NSN 6610-01-511-0982
NSN 5945-01-212-1906
NSN 5855-01-529-8717
NSN 5910-01-595-6126