Originally Posted by dosmom
If I try to use an oversize bolt are those in increments of 1/8 inch? It looked like I needed to go to a 5/8 from possibly a 1/2
Uhh, no
The threads you have are 14mm. You don't really want to go up to the next size, 16mm, it's not a common size at all. Helicoil is the best option but like I said I would put a Fumoto on it with some blue loctite, and move on with life.