M18 x 1.50mm Thermal Switch. Turns electric fan on at 79.5°C (175°F)
The Aeroflow Performance thermal temperature switch allows your electric fan to turn on and off at the present temperature of 79.5°C. This bi-metal temperature switch has an O-ring seal M18 x 1.50mm thread, which is specifically designed to suit the Aeroflow Performance Competition Oil Coolers (AF72-6000, AF72-6001, AF72-6002, AF72-6003).