A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5925-01-063-7107
NSN 6110-01-443-8770
NSN 5945-00-402-8563
NSN 5960-01-617-6345
NSN 6645-01-214-0334
NSN 5965-00-802-6683
NSN 5985-01-251-0844
NSN 5835-01-285-3704
NSN 6130-00-288-1886
NSN 5895-01-188-7470
NSN 5835-01-426-6573
NSN 6105-00-482-2658