A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5930-00-309-0874
NSN 4140-01-394-8923
NSN 5905-01-460-2595
NSN 5905-01-223-9782
NSN 5915-01-101-6841
NSN 6105-01-245-5917
NSN 6105-00-914-8323
NSN 6610-01-406-4985
NSN 5930-01-445-7322
NSN 5915-00-008-4198
NSN 2925-00-221-8529
NSN 5965-01-101-2187