A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6105-01-383-3657
NSN 6610-00-730-5883
NSN 4140-01-417-2611
NSN 5945-01-120-9120
NSN 5990-00-281-4164
NSN 5930-01-052-5922
NSN 6620-01-145-7762
NSN 6130-00-043-3843
NSN 6685-01-360-5202
NSN 5998-00-466-3142
NSN 5985-00-876-8576
NSN 2925-00-246-3077