#12 AN W/P Fitting - Polished

The #12 AN W/P Fitting - Polished by Meziere is a precision hydraulic adapter engineered for high-performance fuel, coolant, and brake line applications in modified vehicles and race engines. This fitting serves as the backbone of custom fluid delivery systems, connecting braided hose assemblies to fuel rails, carburetors, radiators, and brake distribution blocks with reliable leak-free performance. Whether you're building a street rod, competition engine, or custom cooling circuit, this AN fitting delivers the secure, repeatable connections that serious fabricators and engine builders demand.

Constructed from aluminum alloy with a polished finish, the #12 AN W/P fitting features a 37-degree JIC flare design that creates a metal-to-metal seal—far superior to rubber gaskets under pressure and temperature cycling. The "W/P" designation indicates this is a wrap-and-pinch style fitting, meaning the braided hose end is compressed securely inside the fitting body by a reusable aluminum ferrule and lock nut. The polished surface resists corrosion while maintaining a professional appearance in exposed engine bays, while the compact 4.65 x 2.15 inch footprint allows integration into tight custom fabrications without sacrificing flow capacity or structural integrity.

Mechanics and fabricators choose #12 AN fittings for applications demanding high flow at moderate pressures—typically fuel systems up to 60 psi, coolant circuits, and brake upgrades on custom builds. Compatibility extends to any system using -12 braided hose (3/4-inch nominal ID), making this fitting essential for matching OEM fuel rails, aftermarket carb adapters, and custom manifold ports. Installation requires only a wrench and basic plumbing knowledge; the reusable design allows multiple service cycles without degradation, making it an economical choice for prototype builds, race engines, and enthusiast restorations.