A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6320-01-470-6826
NSN 5999-00-614-2721
NSN 5945-00-060-7189
NSN 6105-01-251-5174
NSN 6320-01-103-6218
NSN 5905-01-184-9728
NSN 5905-00-142-2298
NSN 5998-01-623-6930
NSN 5910-01-223-6373
NSN 6650-01-356-5947
NSN 7035-01-184-8905
NSN 6620-01-249-8696