The Hatco 2.16.116 Hi-Limit Control helps protect compatible heating equipment from excessive temperatures by interrupting operation when the temperature exceeds a preset safety limit. Designed with a 1/4-inch by 4-inch copper sensing bulb and a 3/8-inch stuffing box, this control monitors temperature through its sensing element and responds when the specified threshold is reached. It... https://partsfe.ca/216116-hatco-high-limit-control-163k-14-x-4-20