A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6320-00-036-3688
NSN 7035-01-254-3606
NSN 4140-01-112-1729
NSN 5950-01-203-6874
NSN 5996-00-292-5394
NSN 6650-00-537-9222
NSN 5905-01-372-1950
NSN 6610-01-075-4745
NSN 5999-00-151-9955
NSN 6240-00-542-6657
NSN 5905-01-594-2937
NSN 5910-00-763-1848