A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6150-01-041-5501
NSN 5910-00-346-9724
NSN 5895-01-398-1057
NSN 5910-01-441-5739
NSN 5998-01-107-6942
NSN 5835-01-416-6449
NSN 5965-01-142-1807
NSN 6220-00-449-9961
NSN 6105-00-914-2232
NSN 6150-01-246-4371
NSN 6645-01-623-6233
NSN 5998-01-578-6064