Originally Posted by Rusty

Your options.
1. Reuse bolt as is.
2. Chase the threads with a die to clean up.
3. Use a little bit of anti-seize to help the thread.
4. Get a new bolt.

I've done all 4 at one point or another in my life.
What is the bolt for? Caliper bracket to knuckle?
If that is what the bolt is for. And by looking at the head of the bolt. The flank of the face doesn't look to healthy. So I would pick option 4. Because of the flank starting to round off.But I don't know what the rest of the head looks like.