AN to NPT Straight #6 x 3/8

The AN to NPT Straight #6 x 3/8 fitting from Triple X Race Components is a precision adapter engineered for high-performance fuel, oil, and hydraulic system plumbing in custom and race vehicle builds. This straight-configuration hose end bridges AN (Army-Navy) port standards to NPT (National Pipe Thread) system components, making it indispensable for builders integrating aftermarket fuel injection systems, turbo oil lines, or custom cooling circuits. Whether you're fabricating a fuel rail for a turbocharged engine swap or routing braided hose through a competition chassis, this adapter ensures leak-free, vibration-resistant connections at critical pressure points.

Triple X Race Components manufactures this fitting with the precision tolerances demanded by professional engine builders and fabricators. The #6 AN port accommodates standard -6 hose (3/8-inch inner diameter), while the 3/8 NPT inlet threads into female NPT bosses on engines, radiators, or aftermarket manifolds—eliminating the need for bulkier adapter plates or secondary fittings. The straight design minimizes flow restrictions and pressure drops, critical in high-RPM racing applications where fuel delivery consistency directly impacts performance. Black anodized finish resists corrosion and maintains a clean appearance in engine bays.

Engine builders, fabricators, and track enthusiasts rely on this fitting for carbureted-to-injected conversions, LS and small-block engine swaps, and custom cooling or vacuum systems where OEM hardline ports don't align with modern plumbing standards. Its compact 1.75-inch length fits tight engine bay layouts without fouling intake manifolds or valve covers. Install with appropriate thread sealant on the NPT end and secure AN -6 hose with industry-standard crimp or reusable fittings; this adapter maintains system integrity under boost pressure and sustained high-temperature cycling.