A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5975-00-134-9779
NSN 4140-01-131-2817
NSN 5960-01-474-4843
NSN 5996-00-252-5682
NSN 5895-01-056-4548
NSN 6610-00-407-4295
NSN 6145-00-152-6499
NSN 5920-01-357-7165
NSN 6645-00-119-6221
NSN 5930-01-492-8503
NSN 5935-00-880-3988
NSN 2925-01-019-1672