Copper washer 18mm, for temp gauge sensor or temp light switch.
22472009, HG22263
£0.89
Sensor which screws into the water housing by the water pump to operate the original temperature gauge.
The wiring connection differs from the original item, but it works the same.
Please note that some later fuel injected models have the sensor mounted on the air valve at the side of the engine and that version has a 16mm thread, so this part will not fit.