TYM 394 Tank Fill Thread?

[markus_394]

Hello All,

Does any know what the threads are on the TYM 394 Hydraulic Tank fill plug?
I installed a Downforce cylinder on my Auger attachment. The return line on the downforce cylinder is free return to the hydro tank (raising the 3 pt will move the downforce piston, hence unpressurized return line). I see no free ports/plugs on the 394 to do so other than the fill plug. The threads are clearly some metric variant as expected, definitely not NPT or such. From the measurements I took, I cannot match this to anything to date.
I need to make an adapter from the fill plug to a hose quick connect. If I knew the thread specification for the fill plug, this will be easy...
I hope this is not some custom creation by TYM...

Thanks for any help!
Mark

 

[ptsg]

The threads are most likely BSPP. The exact size, I don't know.