A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 7035-01-026-0117
NSN 5960-00-552-9500
NSN 5930-00-038-7775
NSN 6145-01-274-3354
NSN 5905-01-250-8883
NSN 5920-01-603-0581
NSN 6105-00-372-4716
NSN 5950-01-227-1318
NSN 5930-00-187-2732
NSN 5915-01-465-9400
NSN 5935-00-241-4078
NSN 5905-01-215-3124