Standard 1/4" male pipe thread (NPT) to male standard propane left-hand thread ( 9/16-18 LH).
High Quality very fine control.
Often paired with an emergency fast full port shut-off ball valve upstream.
NOTE: we also have this valve with alternate thread options that just are not online yet, plus many adapters to fit most applications. Give us a call or email if you need a solution. If it's complicated ask for Sean.
Soon I'll be posting some tips on drill, and taps and tricks you can use to customize these.
You can also ask for a custom machined valve that allows a mig tip to be threaded inside one end. Configurations coming online pretty soon.