A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5905-01-487-8868
NSN 5935-00-268-3774
NSN 6130-01-210-7856
NSN 6240-01-469-9550
NSN 6150-01-407-5499
NSN 6145-00-140-1605
NSN 6110-01-145-7388
NSN 6610-01-433-2219
NSN 5910-00-957-9938
NSN 5965-00-222-7394
NSN 4140-00-003-7228
NSN 4140-01-478-2409