A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6130-01-412-1184
NSN 6220-00-660-5539
NSN 6145-01-075-1042
NSN 6650-00-451-1088
NSN 5999-01-508-9710
NSN 7035-01-512-1826
NSN 5925-01-442-7357
NSN 5998-01-327-3867
NSN 5855-01-631-4331
NSN 5905-01-076-8843
NSN 6610-01-033-2402
NSN 5920-01-634-0250