A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5930-01-546-2538
NSN 6620-01-512-2016
NSN 6610-00-400-1252
NSN 6240-00-286-0742
NSN 5895-00-302-3709
NSN 6110-00-773-0915
NSN 5945-01-556-7258
NSN 5960-01-399-4327
NSN 5996-01-167-0027
NSN 6320-00-977-3930
NSN 6240-00-866-4143
NSN 5905-01-148-9126