Does anyone know where I can get a M20x1.5 to 1/8 npt adapter? I want to install my stri xline oil temp sensor (I think it's 1/8 npt) in my greddy oil sandwich (M20x1.5) but they have different threads...

Blitz has that adapter; unfortunately it's only carried in the UK...

 

The Greddy adapter sensor ports are 1/8" straight threaded not tapered (bsp I believe is the designation). You need to get a 1/8" npt tap and use a drill or socket wrench and just run it through there. I believe that is what all the shops here do... It is very easy and takes only 1 minute once you have the tap. Don't go too deep otherwise your sensor threads will not be long enough to properly seat and seal.

 

also the m20x1.5 is the center nut's thread that attaches the sandwich plate to the motor. That has nothing to do with the sensor ports.

 

Thanks guys...

So...does anyone know the size of the big thread to the left shown in this pic of the sandwich?

 

I think that big thread to the left is thermostat. Mocal sandwich plate has same thread as you showing in the pix and it is thermostad. I could be wrong.

 

No its a M12 Bolt i got the Adapter and saw the info on the back of its cover the diagram shows the two 1/8 PT threads with this M12 bolt