Tube Nut

At Pit Stop USA, we have a great selection of Tube Nut Fittings for your automotive plumbing needs. From AN and NPT fittings to fuel line and hose fittings, we offer a wide range of products to help you assemble a custom plumbing system for your competition vehicle or keep your classic car period-accurate. Our selection also includes adapters and reducers to make it easy to switch between fittings. With over 25 years of experience, we're proud to offer the most complete line of adapter fittings for aviation fluid transfer technology in the automotive performance market. You can trust us to meet all of your aviation fluid transfer technology needs and experience top-notch performance today!

Tube sleeves and tube nuts are used to transition from hardline tubing to AN fittings & AN plumbing. These parts are used with a 37 degree flaring tool that is used to form the end of the tubing.