A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5935-00-052-2079
NSN 5835-01-436-6549
NSN 6145-00-335-1336
NSN 7035-01-508-6447
NSN 5998-00-280-6132
NSN 5925-01-180-9353
NSN 5910-01-578-6247
NSN 5990-00-088-7591
NSN 5975-01-320-4341
NSN 6645-01-410-8905
NSN 6220-01-175-7360
NSN 5835-01-020-5650