A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6145-00-170-5274
NSN 5950-00-078-4433
NSN 5835-00-770-2843
NSN 5998-00-350-2514
NSN 5950-01-310-8486
NSN 5930-00-280-2562
NSN 5935-01-113-8230
NSN 5915-01-100-1180
NSN 6220-01-454-6767
NSN 6105-01-600-7860
NSN 5920-01-541-4417
NSN 5925-00-100-5760