A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6610-01-030-5491
NSN 5915-01-050-8214
NSN 5910-00-998-4024
NSN 5935-00-059-3613
NSN 5905-01-602-9868
NSN 2925-01-599-1901
NSN 6240-01-284-6482
NSN 5910-00-909-6566
NSN 5930-01-580-0691
NSN 5915-01-255-2465
NSN 4140-01-423-9453
NSN 5855-01-615-7672