Durable metal radiator fan temperature switch for general automotive use with reliable temperature measurement to help prevent engine overheating. Compatible with 1/8 inch NPT thread size for use across a wide range of applications. Complete cooling solution Engineered to fit most engines, radiators, and water outlets. Activates at 210°F and deactivates at 145°F, providing precise control over your vehicle's electric cooling fan operation. Accurate temperature monitoring Brassblack construction measuring 5.3 x 0.6 cm. This switch measures liquid temperatures including coolant, motor oil, and water, while withstanding harsh engine compartment conditions. Easy installation 3.18 cm thread length and standard 1/8 inch NPT port for straightforward mounting in automotive, marine, and industrial applications requiring dependable heat management. Applications Automotive: control radiator cooling fans to prevent overheating in street and performance vehicles. Marine: manage engine cooling in boats with reliable fan activation and deactivation. Industrial: temperaturedriven cooling for equipment such as generators and pumps that require automatic fan control.