3AN STR Male Adapter 1/4in NPT Male Blue

The 3AN STR Male Adapter 1/4in NPT Male Blue from REDHORSE PERFORMANCE is an essential hydraulic and pneumatic fitting for custom fuel, coolant, and brake system builds. This straight adapter bridges the gap between AN (Army-Navy) hose connections and standard NPT (National Pipe Thread) ports found on carburetors, fuel regulators, oil coolers, and manifolds. Mechanics and performance enthusiasts rely on these adapters to transition between different port standards without sacrificing flow integrity or introducing leaks in high-pressure applications.

Constructed with precision engineering, the 3AN STR Male Adapter features a true male port on the AN side and a 1/4-inch NPT male thread on the component side, allowing direct connection to female NPT bosses. The blue anodized aluminum construction provides corrosion resistance and a factory-finished appearance that suits both street and competition builds. The straight (STR) geometry ensures minimal turbulence and maintains consistent pressure delivery, critical for fuel injection tuning, oil cooling circuits, and brake bias adjustments where flow characteristics directly affect system performance.

This adapter excels in retrofit fuel systems, custom engine bays, and restoration projects where OEM ports don't align with modern aftermarket components. Install using appropriate thread sealant (PTFE tape or anaerobic compound) on the NPT side to ensure a leak-free seal under load. The compact 3.1 x 1.1 x 3.9-inch dimensions and minimal 0.05 lb weight make it ideal for tight engine compartments and weight-conscious builds. Compatible with any system using 3AN hose and 1/4-inch NPT female ports, from fuel distribution blocks to transmission coolers.