The Hatco 02.16.066.00 EGO thermostat is a mechanical temperature control component designed with 1/4-inch terminals and a D-shaped stem with a flat left orientation for precise knob alignment. It works by sensing temperature changes and opening or closing internal electrical contacts to regulate power to the heating element, helping maintain the selected temperature setting. This responsive control helps prevent overheating while supporting steady performance. Benefits include dependable temperature regulation, straightforward installation, compatibility with standard control knobs, and durable construction suited for commercial environments, making it a practical replacement part for maintaining reliable temperature management and overall equipment functionality.