Straight Adapter Fitting -12AN x 1in NPT

The Straight Adapter Fitting -12AN x 1in NPT from Vibrant Performance is an essential fluid transfer component designed for high-performance automotive fuel, oil, and coolant systems. This adapter bridges the gap between AN (Army-Navy) hose standards and NPT (National Pipe Thread) port configurations, making it indispensable for engine builders, turbo installations, fuel system upgrades, and custom plumbing applications. Whether you're retrofitting a late-model fuel rail onto a classic engine block or modernizing an older cooling system, this fitting ensures leak-free connections where incompatible threading standards meet.

Vibrant Performance manufactures this straight adapter with precision machining to ensure zero-degree flow direction—critical for minimizing pressure drop and turbulence in high-flow applications. The -12AN port accommodates standard 12AN hose (3/4-inch ID), while the 1-inch NPT female thread accepts common engine block ports, transmission coolers, and aftermarket manifolds. Aluminum construction balances lightweight design with durability, though proper PTFE thread-seal tape application is essential to prevent weeping at the NPT interface. The compact 0.15 lb weight and minimal footprint make this fitting ideal for tight engine bay layouts where space constraints demand efficient solutions.

Professional mechanics and performance enthusiasts rely on this straight adapter for LS engine swaps, custom fuel system fabrication, and engine bay restorations where factory fittings don't align with modern component standards. It's particularly valuable in applications involving aftermarket fuel pumps, inline fuel filters, oil coolers, and coolant bypass circuits. Verify your NPT port size before ordering—this unit accepts 1-inch NPT threads only—and ensure your hose barbs or AN fittings are rated for your system's operating pressure and fluid type. Quality construction from a recognized performance brand means fewer leaks, easier serviceability, and confidence in critical engine systems.