A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6610-01-614-8741
NSN 5945-01-542-6803
NSN 5915-00-894-3825
NSN 5950-00-719-4787
NSN 5960-00-948-5806
NSN 5985-01-113-7837
NSN 5910-00-414-3416
NSN 6110-00-938-5676
NSN 6145-00-107-7913
NSN 6105-00-944-2754
NSN 6110-01-089-9017
NSN 5945-01-462-5903