I got that one from JohnDeere but they all use the same part for hydro steering medium sized vehicles.
invoice shows p# AL168711
I just grabbed the two metric taps from my toolbox that I think are the ones I bought for the steering. inner threads are M22X1.5 outers are M24x1.5
I think it was Scott@rockstomper that I emailed and inquired about getting the metric threaded one made as his rams look like the best to me, he declined to try it so I had this cheapo ram machined
I am making the most expensive, homebrew, garbage, hydraulic steering ever created in keeping with my theme of spending twice as much on crap as the best available can be found for
if you look at one of the steering upgrades for duramax trucks you will see they start with one of these and whittle it down to replace the tiny junk that comes from chevy