A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6220-00-471-4011
NSN 6130-01-462-0518
NSN 6240-01-258-6298
NSN 5965-01-237-3342
NSN 6650-01-444-2152
NSN 6110-00-285-1895
NSN 5835-00-827-1904
NSN 6685-01-493-7592
NSN 5915-01-562-1366
NSN 5835-01-654-4570
NSN 6150-01-596-7697
NSN 2925-01-645-2948