Originally Posted By: Trav
Get one of these for next time, just give the damaged threads a quick once over with the correct pitch on the file and its good to go.
This is not a replacement for a die but it works on any size even the large ones where a die can cost a fortune.
This is a metric one but they sell a 4 piece set that will cover almost any thread your likely to encounter.
https://www.amazon.com/Nicholson-Thread-...rds=thread+file
I see Chis 142 replied at the same time.
Get one of these ^^^^^. Clean up the treads on the stud. Be patient. It may take a few minutes to clean up the stud good enough so the nut easily goes on by hand. Then, as mentioned above, replace any nut that you forced over the damaged area of the stud. In many situations, stud thread damage being one of them, I find a thread chaser file like this one, to be a much better choice than a die. First and foremost, how are you going to clear the adjacent studs with a die wrench handle? Second, even if you decide to forego the die wrench and turn the die with a vice grip or channel lock (really a suckie way of doing it), if the damaged area is too close to the end of the stud, it can be very hard to be sure you get the die started right, and you don't end up cutting new threads and ruin the stud.
Don't ignore the damage and think all is well since you got the nut on. There is a good chance that the nut will not come off with ease now. And, with Murphy riding co-pilot, it will be the most inconvenient time when you can't get the nut off. Do it now while it is at your convenience. An ounce of prevention . . .