A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6645-01-202-4674
NSN 4140-00-873-7587
NSN 6240-01-364-8696
NSN 6620-00-443-7587
NSN 5996-01-502-7535
NSN 5930-01-189-5343
NSN 5920-01-592-3220
NSN 5925-00-049-2072
NSN 6320-01-224-0063
NSN 5985-00-943-5158
NSN 5925-00-192-0767
NSN 5965-01-208-6903