A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6110-01-033-6888
NSN 6130-01-500-7287
NSN 5930-01-174-0613
NSN 5930-00-255-4173
NSN 6650-00-503-0906
NSN 6685-01-372-6010
NSN 6150-01-117-8713
NSN 6620-00-593-5313
NSN 5960-00-900-6705
NSN 6145-01-276-3415
NSN 6110-00-204-5697
NSN 5945-01-392-0871