A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5905-00-581-2878
NSN 6150-01-437-8548
NSN 5985-01-379-5646
NSN 5895-00-089-5713
NSN 5990-01-108-7785
NSN 6110-01-100-4445
NSN 5950-01-469-5974
NSN 6110-01-173-8808
NSN 4140-00-610-7789
NSN 6145-01-540-2225
NSN 6150-01-193-8703
NSN 6240-01-560-5697