Fitting 4an 9/16in-18

The Fitting 4AN 9/16in-18 from Tilton is a precision hydraulic adapter engineered for high-performance brake and clutch systems in race cars, track vehicles, and serious street builds. This compact male adapter serves as a critical junction point in custom fluid line networks, allowing mechanics and fabricators to seamlessly connect 4AN hose assemblies to systems with 9/16-inch-18 UNF threaded ports. Whether you're plumbing a competition brake setup, upgrading a hydraulic clutch system, or integrating aftermarket components into a modified vehicle, this fitting ensures leak-free connections under extreme pressure and temperature cycling.

Tilton's 4AN 9/16in-18 fitting is manufactured to OEM racing standards, featuring precise thread geometry that mates reliably with industry-standard female ports found on master cylinders, proportioning valves, accumulator blocks, and custom manifolds. The 4AN designation indicates a nominal outside diameter of 1/2 inch, a metric standard across professional racing hydraulic systems, while the 9/16-inch-18 UNF thread ensures compatibility with legacy and modern performance components alike. Compact dimensions—measuring just 2.4 by 0.85 by 3 inches—make installation feasible in tight engine bays and custom fabrication layouts where space constraints demand efficiency. The lightweight construction at 0.09 pounds minimizes added mass without sacrificing structural integrity or pressure rating, critical for weight-sensitive motorsports applications.

This adapter is ideal for fabricators, race mechanics, and performance enthusiasts who demand tool-grade reliability in custom brake and hydraulic builds. Installation requires a wrench to secure the fitting into the threaded port—torque according to Tilton specifications to prevent damage or leakage—and a 4AN hose assembly on the opposing end. Verify thread compatibility before purchase: the 9/16-18 UNF format is standard on many Tilton master cylinders, professional brake proportioning valves, and aftermarket hydraulic blocks, though you should confirm your specific system's port specification. Stock this fitting for emergency replacements during race weekends, or order multiples for complex multi-circuit brake or clutch fabrication projects.