6AN Male to 3/8in Hose Barb Straight Blue

The 6AN Male to 3/8in Hose Barb Straight Blue fitting by REDHORSE PERFORMANCE is a precision-engineered adapter designed for custom fuel, coolant, and hydraulic fluid systems in performance and modified vehicles. As a mechanic building high-performance engines or upgrading fuel delivery systems, you'll recognize this fitting as essential infrastructure for connecting AN-rated hardline fuel rails to flexible hose runs.

The straight configuration eliminates unnecessary bends, reduces turbulence, and maintains system integrity under pressure—critical factors when routing fuel or coolant through engine bay modifications where space and flow efficiency matter. Constructed from billet aluminum with a blue anodized finish, this adapter features a male 6AN thread on one end and a 3/8-inch hose barb on the other, allowing seamless transition between AN hardlines and reinforced rubber or silicone hose.

The barb design creates a positive mechanical lock with hose clamps, preventing leaks and separation under vibration and thermal cycling—both common stressors in turbocharged and supercharged applications. REDHORSE's engineering ensures tight tolerances and smooth internal passages that preserve fuel flow rates and system pressure ratings, critical when paired with high-volume fuel pumps or direct-injection setups requiring precise metering. This fitting is ideal for fuel system relocations, catch-can installations, and surge tank builds.