I sent off an S5 TII motor to be built a while ago and it returned with this thermo switch missing. I contacted the builder about it however he cannot find the switch. The car is no longer running A/C so just plugging the hole is fine. I hunted through the plumbing sections of Lowes/Home Depot to no avial.

Does anyone happen to know the thread pitch and size of the sensor or have one lying around they can measure? I would like to order a plug online. Thanks.

 

I thought it was 3/8 NPt but it is a weird thread

 

Thread size is M16x1.5