#3 x 10mm X 1.0 Bubble Flare Brake Fitting

The FRAGOLA #3 x 10mm x 1.0 Bubble Flare Brake Fitting (Part #650310) is a precision adapter designed to transition between AN (Air Force-Navy) standard fittings and metric bubble flare brake lines. Constructed from steel with zinc-oxide plating, this straight-thread fitting connects a #3 AN male port to a 10mm x 1.0 male bubble flare port, making it essential for custom hardline brake system builds where metric and imperial standards must interface. The compact design—measuring just 1.05 x 0.7 x 4.15 inches and weighing 0.03 lbs—integrates seamlessly into space-constrained applications.

Bubble flare brake fittings deliver superior sealing compared to standard flare connections by compressing the flare around the fitting seat, reducing the risk of fluid weeping under pressure cycling. The zinc-oxide finish provides corrosion resistance critical for brake systems exposed to moisture, salt spray, or high-humidity storage conditions. The steel construction maintains integrity across thermal cycles, a key requirement in high-performance applications where brake fluid temperatures fluctuate significantly. This adapter's straight geometry eliminates unnecessary bends in the hardline, reducing potential stress concentration points.

Buyers assembling custom brake systems—whether for off-road vehicles, performance applications, or restoration projects—rely on metric-to-AN adapters when sourcing components from mixed suppliers or integrating newer metric-standard components with existing AN infrastructure. This fitting supports hardline installations where tube bending and flaring are performed in the field, offering the flexibility to match existing port configurations. The #3 AN designation equates to 3/16-inch bore, standard for light-duty brake circuits. Proper bubble flare assembly and torque specifications per automotive engineering standards ensure long-term reliability and leak-free operation.

FRAGOLA is recognized in the performance brake and fuel system market for precision-engineered adapters and hardline components. This adapter is sold as a single unit and functions as a critical connection point in modular brake system design, where individual fittings are selected to match specific port configurations and tubing standards. Users should verify bubble flare compatibility and port threading before installation to avoid cross-threading or improper sealing.