Stop in for a cup of coffee

dukeboy_318 said

I have some of that. I was hoping to find something to hold around 1200 degrees to be safe.

Click to expand...

If the thread hole is close to the water jacket, the iron will be closer to 210*F than the 1200 + of the exhaust gases.
If the threads are damaged, 'nother story. Locker and sealants work best when theres actually a thread.