Stand. Fitting Tube

The Stand Fitting Tube by Holley is a precision adapter fitting designed for fuel system applications where reliable, leak-free connections are critical. This straight adapter serves technicians and enthusiasts who demand dependable fuel delivery systems in performance vehicles, custom builds, and restoration projects. The fitting bridges two different thread standards seamlessly, enabling proper fuel line routing without compromise or jury-rigged solutions.

Engineered from durable brass in natural finish, this adapter features a 5/8-18 inverted flare female connection on one end and a 9/16-24 male thread on the other, making it an essential component for connecting fuel lines with mismatched thread patterns. The inverted flare design provides superior sealing characteristics compared to standard flare fittings, reducing the risk of fuel leaks under pressure and vibration. Brass construction offers excellent corrosion resistance while maintaining compatibility with ethanol-blended fuels and modern fuel additives, ensuring longevity in demanding automotive environments.

Fuel system builders and restoration specialists benefit most from this fitting when adapting carbureted fuel systems, vintage engine conversions, or custom fuel delivery setups where OEM hard lines and components use different thread specifications. Installation is straightforward—simply thread the male end into the receiving port and connect the inverted flare female side to your 5/8-18 fuel line or component. The compact design (3.5 x 1.2 x 5 inches) fits tight engine bays without interference, and the lightweight brass construction (0.06 lbs) adds negligible weight while maximizing reliability.