- Function and reliability: This durable metal radiator fan temperature switch provides reliable temperature measurement to help prevent engine overheating. It is designed for general automotive use and uses a 1/8 inch NPT thread for broad compatibility across applications. - Precise cooling control: The switch activates at 210 F and deactivates at 145 F, offering precise control of your vehicle's electric cooling fan operation. - Durable sensing and versatile temps: Brass-black construction measures liquid temperatures including coolant, motor oil, and water, while withstanding harsh engine compartment conditions. Size: 5.3 x 0.6 cm. - Easy installation: Thread length 3.18 cm and standard 1/8 inch NPT port enable straightforward mounting for automotive, marine, and industrial applications requiring dependable heat management. - Broad compatibility: Engineered to fit most engines, radiators, and water outlets. - Practical use scenarios: Ideal for passenger cars needing automatic fan control, boats with engine cooling systems requiring fan activation, and industrial equipment or generators that rely on radiator or coolant temperature sensing to drive cooling fans.