I assume you'll have to re-die those threads. It's hard as hell to cut a bolt with boogered threads without leaving an orphan crest to just get it cross-threaded again.

If you don't have a handyman with a tap-and-die kit, use your nut to pick the right diameter and pitch. You can get a kit at Harbor Freight pretty cheap.

As Dobro mentioned, get yourself a die with hex flats on it and try to clean up the threads.

Don't worry about a die wrench, because with that center projection in the way, it probably wouldn't fit.

Alternatively, from my 'shade tree' department:

If the new nut will thread on at all, just stack a bunch of washers under it so you can get pressure on the part you are trying to tighten. You could also cut a piece of tubing (say copper) and put that over the messed up part instead of the washer stack.

Again, that's shade-tree, but sometimes when I've been under pressure I resort to such things until I can fix it 'right,' if at all.

Good luck.

Thanks guys. I used a die and was able to easily rethread the bolt. Had no idea you could do that. Pretty cool tool!

Buys it 7 years ago and it sits...
Needs it up and working ASAP!!!

Sorry, the urgency in the OP combined with that admission in your last post cracked me up! Glad you got it working!