A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6685-01-063-5478
NSN 5965-00-553-6898
NSN 5905-00-754-3327
NSN 5895-01-122-7944
NSN 5930-01-268-9558
NSN 5950-00-075-5460
NSN 7035-01-413-6697
NSN 2925-00-001-4604
NSN 5920-00-481-1419
NSN 5915-00-226-0910
NSN 5910-01-365-4301
NSN 6105-01-178-7893