The original bolt was an M8x1.25x100mm of #8 hardness. If I put a new bolt into the hole, it does grab but is VERY loose and not suitable to hold it's braket in place.
I was hoping to find an M9x1.25x100mm bolt, but no luck. I then tried to locate an 11/32"x4" bolt and again, no luck.
So now I figure I can drill this hole out a bit and cut threads for a 3/8"x4" bolt...
Does this sound reasonable?
My biggest issue is clearance. I had to use a 90' drill to get the broken bolt out. There is almost no visibility to see if the hole is straight. The bracket that mounts here does not have any critical tolerances.