A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6620-01-599-2011
NSN 5950-01-139-6830
NSN 2925-01-569-3795
NSN 7035-01-243-2730
NSN 5975-00-564-8335
NSN 7035-01-270-0325
NSN 5996-01-645-2096
NSN 5930-00-596-1694
NSN 6610-00-480-1200
NSN 5999-00-717-3101
NSN 6105-01-436-8126
NSN 5895-01-251-9535