AAB1992;4362844So if 3/4’s of the thread is sound and try and force the bolt past the damaged section will this be okay? [/QUOTE said:
As said, a proper thread tap is the best way to go. However, if such a thing is a bit expensive for the one job, you might like to try this.
If I read/remember this thread correctly, one bolt came out ok, but you've correctly bought two new ones. That's great.
Take the whole old bolt and with a hacksaw, cut a slot along the thread, maybe two, or more. This makes a sort-of tap.
Screw it into the hole, and once it gets to the damaged bit, no more than quarter turn at a time, and don't force it. If you're lucky, it will clean the thread adequately to use. Lubricate it to help, but don't force it. If it feels tight at any point, back it out and run away. You don't need to do the drill and dremel act again.
Just forcing the new bolt in may break it, and will render a torque wrench irrelevant.