These adapter fittings are available in a variety of configurations. They push-on and secure to most modern USA, European, Japanese, etc. fuel injection systems and are used to convert an OEM SAE Quick Connect connection. Scroll down for a photo of each part number.
Adapter 3/8 inch Fuel Line to AN6 (ethanol sensor)
Adapter 3/8 inch Fuel Line to AN8 (ethanol sensor)