A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5996-01-518-1502
NSN 5905-00-222-0427
NSN 5960-00-938-7569
NSN 6110-00-735-6997
NSN 6220-00-882-1647
NSN 5950-01-479-2725
NSN 5905-01-299-1670
NSN 5975-01-412-0782
NSN 6150-01-243-6882
NSN 5996-01-367-4209
NSN 5920-01-183-7938
NSN 5895-01-205-2047