Seems like a lot of other comments say the thread is British or O ring boss #8 or half inch I’ve found my valve to be national pipe thread… what ever just change the fittings
I bought this valve to put on my tractor to do away with the 2 lever valve that was on it .the price was amazing and the quality and performance is awesome I've had it on my tractor for a year now and best choice by far.
Nothing wrong with the valve or it's function.It does NOT have the "power beyond" ability. If your set up has 3 lines going to the pump/tank you may lose function elsewhere on the tractor.I found out the hard way, don't be like me.
Good controller for the money. Nothing is labeled so it’s trial and error. Works fine though. On mine the feed is the lower side input, return is opposite side, and they work top/bottom… not side by side on my loader hope this helps the next guy.
John 
