A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5855-01-526-9352
NSN 5920-01-209-2219
NSN 6240-00-480-7896
NSN 2925-01-199-7394
NSN 6105-01-592-4134
NSN 6220-01-173-7860
NSN 5855-00-466-2309
NSN 6610-00-276-8919
NSN 7035-01-574-8187
NSN 5915-00-097-8415
NSN 6105-01-333-6778
NSN 5910-01-464-3879