A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5998-01-492-2291
NSN 6145-00-156-4394
NSN 5985-00-784-0432
NSN 6130-00-139-9232
NSN 5975-01-270-3929
NSN 6650-01-093-5864
NSN 5945-01-059-0611
NSN 6610-01-431-7840
NSN 4140-00-260-9521
NSN 5950-01-382-0522
NSN 6105-01-462-6863
NSN 5990-01-277-9753