Thermostat housing spare bung thread size

starletsy

Member +
So I want to fit a water temperature gauge and want to fit it in the spare port in the thermostat housing. I know zep racing sell an adapter but it’s expensive for what is is when shipping is take into account. I did some searching and found someone posting that it was M16 x 1.5 it’s definitely not a metric thread as I have a metric thread pitch gauge here.
I believe it’s 3/8 Npt but before I order a fitting can anyone confirm?
 

starletsy

Member +
Well its not 3/8 npt been through all my stuff and can't find a match seems a bit expensive paying £12 plus shipping for a Zep one from rhd Japan
 

TylerGlanza

Member +
I saw a post on facebook by sefton and he said it was this. I screenshotted it for reference but youve said m16x1.5 wont fit?

 

starletsy

Member +
I saw a post on facebook by sefton and he said it was this. I screenshotted it for reference but youve said m16x1.5 wont fit?

100% its not M16 that will start like 1/4 of turn and I guess someone has just sent it but the original bung threads in and out nicely.
 
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