adapter with female outlet for 1/8 "NPT sensor. NPT threads are conical and is often used for sensors. These NPT fittings must be sealed to achieve a leak free installation and that is why we recommend our PTFE thread tape found among our products. SPD AN fittings have the absolute highest quality available. All AN fittings are hard anodized, making them highly wear resistant. The AN fittings can be used with all fuels avalible like gasoline, methanol, ethanol and diesel. They are also suitable for use in water, air and oil systems. We offer a full 5-year warranty on all SPD AN connections.