Thermostat housing thread diameter

blackout_89t

King of the roll
Apr 25, 2005
488
0
0
Toronto
Hey...

Does anyone know what size the thread is for the sensor located on the top of the thermostat housing? (see pic below)

I am replacing it with a GM 3/8"npt sensor and I want to see if I can find an adapter before I re-tap the hole.

Thanks.

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sm_photo_missing.jpg