Finally! A thermal switch for LS that's the correct metric thread to screw into the cylinder head, at a reasonable price. NO ADAPTERS NEEDED! No more sticking a temp bulb through the radiator.
Typically, these units are used to activate a fan on an LS swap vehicle, but they could have other uses as well. This unit is rated to close the circuit at 180*. We use these to supply ground to either the fan or fan relay, but it's rated to 30 AMPs for use on the positive side as well.