Single Pin Electric Radiator Fan Ground Thermostat Temp Switch Sensor

Is the correct thread size. But turns fan on at 205 degrees off at 165 degrees. That does work. But not sure what causes variance

I'll see how good it is and how long it lasts in the spring. I've bought other brands off of Amazon and it failed within a week. I have a 57 Belair I'm putting it in. I hope it's a good product.

Works as expected