A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 7035-01-563-7731
NSN 6110-01-140-6953
NSN 5945-00-841-0185
NSN 5835-00-833-7080
NSN 6110-01-633-9660
NSN 5996-00-133-3538
NSN 5998-01-144-3066
NSN 6240-01-444-3508
NSN 7035-01-008-7248
NSN 5930-01-460-0253
NSN 5950-01-018-0891
NSN 5985-00-133-0485