Availability: 10 in stock
Factory part number fd8z7c122d: a snap ring supplied by FORD.
Ford Snap Ring (fd8z7c122d).
Flange nuts distribute clamping load without a washer, so a plain nut at the same torque will mark the component.
The part number is the thing to verify. Where the old part carries no legible number, a VIN and a photograph are enough for us to identify it.