Gauge Adapter #6 Male x 3/8 NPT x 1/8

The Triple X Race Components Gauge Adapter #6 Male x 3/8 NPT x 1/8 (HF-33631BLK) is a precision hydraulic fitting engineered for high-performance fuel and coolant system applications. This straight gauge adapter serves as a bridge between 6 AN male connections and 3/8-inch NPT male ports, with an integrated 1/8-inch NPT gauge port for direct pressure monitoring. Built from aluminum and finished in black anodized coating, it delivers the corrosion resistance and lightweight construction demanded by racing and performance engine builders.

The 6 AN to 3/8 NPT conversion design allows seamless integration between modern -6 hose lines and older NPT-threaded system components—a common requirement in engine retrofits and custom fuel system configurations. The 1/8-inch NPT gauge port eliminates the need for external tee fittings, simplifying installation and reducing potential leak points in pressure-critical circuits. Black anodized aluminum provides excellent durability against fuel degradation and thermal cycling while maintaining a clean appearance under the hood. At just 0.03 lbs, the adapter introduces no meaningful weight penalty.

This adapter is essential for builders integrating aftermarket fuel pressure gauges into carbureted or EFI fuel systems, particularly in hot rod, drag racing, and marine performance applications where NPT-threaded fuel blocks or pump outlets remain the industry standard. Triple X Race Components specializes in precision hydraulic fittings, and this gauge adapter reflects that focus on fit, thread integrity, and reliability under sustained pressure and vibration.

The straight-port design ensures minimal turbulence at connection points, critical for accurate pressure readings and system longevity. NPT threads require sealant or tape for reliable sealing; verify compatible gauge sender specifications before installation to confirm thread gender and port size.