Thermal vacuum valve (TVV) thread pitch

[bahamasair]

Does anyone know the thread size and pitch of the TVV valve in the head next to the coolant temp sensor? I’m going to add another coolant temp sensor and want to use that spot for it. I know I can pull the TVV and see but would like to know if I can order a sensor that will fit so I don’t have to dump coolant more than once.
Thanks for any help.

 

[brettk]

For anyone looking for this in the future…

It’s 3/8” pipe thread.

 

[Kernal]

Have you run that brass fitting into a 1FZFE head and if so did it fit??

Seems like all the other pipe-type threads on our engines/axles are BSPT (British Standard Pipe Taper)??