A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6685-01-516-7535
NSN 6650-00-136-4923
NSN 5920-00-371-1191
NSN 5960-01-282-2386
NSN 5996-00-494-3621
NSN 6220-00-985-0847
NSN 6130-00-100-0175
NSN 6620-00-753-8929
NSN 6650-00-202-4540
NSN 6220-01-472-1791
NSN 5950-00-253-8997
NSN 6150-01-228-7789