my teremostat
http://www.aldn.com/how1.html
I like these personally
Alternatively, you could drill it out.
Just be careful not to damage the existing thread.
Unless you want to retap it for a larger bolt LOL.
I like these personally

Alternatively, you could drill it out.
Just be careful not to damage the existing thread.
Unless you want to retap it for a larger bolt LOL.




