M1 plumbing question

Has anyone ever cut a bit of length off the bottom of a thermocouple on a manual temp gauge? I never had and didn't know if it would phuck it up.

Nope. That is a bulb, and the "wire" is tubing. It's pressurized. The temp gauge is in reality a pressure gauge.

I believe you can get adapters down to 3/8" pipe so you don't have to tap them out "so big."