Adapter Fitting #8 x 9/16-24 Holley Blk

The Adapter Fitting #8 x 9/16-24 Holley Blk by FRAGOLA is a precision carburetor inlet fitting engineered for high-performance fuel system conversions and custom engine builds. Designed specifically for Demon Carburetors and Holley applications, this straight adapter bridges the gap between modern AN-rated fuel lines and carburetors equipped with 9/16-24 threaded ports. Whether you're upgrading from factory equipment to an aftermarket carb or integrating a classic fuel system with contemporary line standards, this fitting serves as the critical connector that ensures leak-free, reliable fuel delivery under boost and sustained RPM.

Constructed from aluminum and finished in black anodized coating, the Adapter Fitting #8 x 9/16-24 Holley Blk combines lightweight construction with corrosion resistance essential for underhood environments. The fitting features an 8 AN male connection on one end—the industry standard for braided stainless or rubber fuel lines—and a 9/16-24 male thread on the opposite end that mates directly with Holley and Demon carburetor inlet ports. At 2 inches in overall length, this straight configuration minimizes flow restriction and maintains proper line routing geometry in tight engine bay applications. The black anodized finish not only protects against oxidation but also provides a clean, professional appearance consistent with modern performance builds.

Mechanics and engine builders working on street machines, race cars, and restored classics benefit from this fitting's direct compatibility with Holley 4-barrel carburetors, Demon racing carbs, and similar vintage-style fuel systems requiring modern line standards. Installation is straightforward: thread the 9/16-24 end into the carburetor inlet port using appropriate sealing compound or PTFE tape, then attach your 8 AN fuel line to the barbed or threaded male fitting. This adapter is essential when converting carbureted engines from outdated hard-line fuel systems to the reliability and serviceability of contemporary braided hose assemblies. Verify carburetor inlet thread size before ordering to ensure proper fit.