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.
 

Jay

Admin
Is it this one you are thinking of using?


If so it's listed as 1/8x28 BSPT
 
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