A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5835-01-198-5142
NSN 5835-01-491-4613
NSN 6130-00-136-1416
NSN 5915-00-553-8755
NSN 5930-00-863-4112
NSN 7035-01-176-2208
NSN 6135-01-597-7685
NSN 5895-01-275-6073
NSN 5996-00-807-8749
NSN 5990-01-550-7827
NSN 6620-00-900-3986
NSN 5998-00-678-3108