A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6130-01-595-1940
NSN 6220-00-260-1711
NSN 5895-00-593-6960
NSN 5960-01-518-4440
NSN 5985-01-472-2458
NSN 5925-01-202-2447
NSN 4140-01-300-5352
NSN 5835-00-856-6744
NSN 6610-01-587-1803
NSN 5835-01-090-0784
NSN 6105-01-352-3848
NSN 6645-01-632-2272