#12 To #6 Reducer Steel

The #12 to #6 reducer steel fitting is a critical adapter for any high-flow fuel, coolant, or brake line system requiring a step-down in AN port size. Built by AEROQUIP—the industry standard for hydraulic and automotive plumbing—this straight adapter allows you to connect 12 AN female ports to 6 AN male outlets with precision and reliability. Whether you're building a custom fuel system, upgrading cooling lines on a performance engine, or integrating aftermarket components with mismatched port sizes, this reducer eliminates the need for custom fabrication and ensures leak-free connections under pressure.

Constructed from zinc oxide-coated steel, the #12 to #6 reducer delivers superior corrosion resistance and durability in both street and high-performance applications. The straight design—as opposed to 45° or 90° configurations—minimizes turbulence and pressure loss across the transition, critical when managing fuel delivery or coolant flow in tight tolerances. AEROQUIP's FCM2413 fitting maintains consistent bore diameter through the adapter body, preventing dead zones where contaminants can accumulate and protecting downstream components. The robust steel construction withstands sustained high-pressure cycles, making it suitable for turbocharged, supercharged, and naturally aspirated engines operating in demanding conditions.

Mechanics and fabricators rely on this adapter for fuel system retrofits, custom cooling system builds, and brake line modifications where port size compatibility is essential. Installation is straightforward—thread the 12 AN female end into your primary line and connect the 6 AN male outlet to your secondary component using standard AN wrenches. Weighing just 0.28 lbs and measuring 3.45" × 1.75" × 5.25", the compact footprint fits tight engine bays without additional brackets or clearance modifications. This AEROQUIP fitting pairs seamlessly with stainless or nylon braided hose assemblies and integrates directly into systems ranging from stock restorations to full race builds.