This cast aluminum adapter fits into the upper radiator hose and is threaded with either 1/8" BSPT, 1/8" NPT or 3/8" NPT port to accommodate most aftermarket coolant temperature sensors.
Allows you to install a coolant temperature sending unit for an aftermarket gauge or a thermostatatic switch without having to drill and tap your existing metal pipes. Our design allows install into the curved portion of the upper radiator hose for a perfect fit. Simply cut and trim the upper radiator hose and install this adapter in-line. Includes the two additional clamps you'll need.
See options below to select the appropriate thread pitch. Autometer gauges and many thermostatatic switches have a sending unit with a 1/8" NPT (27) thread pitch. Most of the gauges and electronics made Japan including Defi, Greddy, Apex-i, HKS have sending units with a 1/8" BSPT (28) thread pitch. Spal Thermostatic Fan Switches sold here at Z1 are 3/8" NPT (18).
Measures an approximate 35mm (1.38'') in diameter.