The Keating 35954 Thermostat K-Type 5/16\" X 5-7/8\" Bulb 30\" Capillary maintains precise and consistent frying temperatures to safeguard food quality and prevent oil degradation in commercial fryers. This mechanical temperature control assembly functions via liquid expansion physics; the fluid sealed inside the sensitive sensing bulb expands as the oil heats up, traveling through the long capillary tube to expand an internal bellows that opens or closes electrical contacts at the set temperature. By accurately switching the heating elements or gas valves on and off, the component prevents dangerous temperature spikes, lowers utility consumption, and extends frying oil longevity. Installing this genuine OEM part guarantees exact thermal calibration, restores automated heat regulation, and ensures code-compliant kitchen safety.