A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5975-01-311-9021
NSN 5835-01-615-4766
NSN 6105-00-852-4117
NSN 5920-01-659-0475
NSN 5905-00-626-9621
NSN 5985-00-086-9364
NSN 5920-01-294-2805
NSN 6150-01-288-3847
NSN 6105-00-056-5034
NSN 6240-01-319-5523
NSN 5945-01-445-5537
NSN 6220-01-376-9287