Umarex thread size on air tube

does anyone know what size threads are on the notos where the air tube and regulator screws on the block?
also the hatsan jet1 air tube unscrews and if appropriate to know what threads it has.
thinking of getting a notos and if the threads are the same getting a dual tank conversion kit for the jet and making a notos subcompact..
I know it won't be regulated but spacers around the firing pin and turn down hammer spring pressure should do the trick.. only wanting around 500 fps
Mark
 
I don't have a Hatsan jet1, and my Notos is not handy, but this is what Copilot spit out for me.


Known Thread Specs:
  • Umarex Notos (factory cylinder):
    • Block-side: M16x1.0
    • Bottle-side (if converted): M18x1.5

  • Hatsan Jet 1:
  • Threading isn’t officially published, but modders report it’s not M16x1.0, and the valve/cylinder interface is proprietary to Hatsan’s modular design.