Catalog #: 17015.99
Painless Wiring Part #: 30103
Designed as inexpensive protection for your electric fan. Provides constant voltage, protects from voltage and amperage spikes and keeps fan from back feeding through the system. The Fan-Thom II comes with a threaded thermostat that screws into the engine block or manifold for a professional installation. Thermostat thread size: 3/8"-18NPTF fitting.