American Volt 200'f Temp 1/2" Inch Npt Performance Electric Fan Thermostat Engine Sensor 3/8" 200'F automotive engine grounding fan switch. 3/8" NPT brass thread-in temperature probe and 1/2" adaptor. Activates fan at 200 degrees and turns off at 185 degrees. Universal fit for any application with a 3/8" or 1/2" NPT port. Threads into engine block, radiator, manifold or water outlet.