You are in trouble. I made the same mistake when I changed my rear bearings. The threaded end of the hub is very thin-walled. I had to take a file and remove the rounded-over portion of the threads. Then I used a triangular hand-saw file to restore the threads. It was painstaking work as the pitch is pretty fine. The nut went on but it took a lot of torque to tighten it to the end play specifications. You could try measuring the size/pitch of the threaded portion and getting a die that matches. If you are lucky (and careful) it may work.
If the round-over is really bad, you could squarely hacksaw the bad portion off, touch it up with a file, and see if the nut threads on. I don't know if there is enough extra thread on the hub to allow this.
Otherwise, it's off to the yards or the dealership.
If the round-over is really bad, you could squarely hacksaw the bad portion off, touch it up with a file, and see if the nut threads on. I don't know if there is enough extra thread on the hub to allow this.
Otherwise, it's off to the yards or the dealership.
