Fuel Cell Bulkhead Fitting -6AN to 3/8in

The Fuel Cell Bulkhead Fitting -6AN to 3/8in (MPN 16906) is a precision-engineered adapter designed for high-performance fuel systems, particularly in custom race cars, fuel cell installations, and modified street vehicles. This straight bulkhead fitting bridges the gap between -6AN male bulkhead connections and 3/8-inch hose barb outlets, allowing clean, leak-free transitions through firewall or tank wall penetrations. If you're building a custom fuel system for a track car, installing an auxiliary fuel cell, or upgrading your vehicle's fuel delivery architecture, this fitting is essential for maintaining proper flow rates and system integrity under pressure.

Machined from aerospace-grade aluminum and finished in black anodize, the Fuel Cell Bulkhead Fitting -6AN to 3/8in resists corrosion and handles aggressive fuel system environments without degradation. The -6AN (AN6) male thread provides a secure, standardized automotive connection recognized across fuel system applications, while the 3/8-inch hose barb ensures a positive mechanical lock when paired with appropriate fuel line. Included washers optimize sealing surface contact and reduce the risk of weeping under vibration and varying fuel pressure cycles—critical when you're running 40+ psi through a custom fuel system. The straight configuration minimizes flow turbulence and dead zones, preserving fuel pressure delivery to carburetors, EFI systems, and fuel regulators.

This adapter is ideal for fabricators and enthusiasts routing fuel lines through vehicle firewalls, fuel cell mounting plates, or custom frame rails on street rods, drag cars, and vintage restorations. Mechanics and engine builders appreciate it as a reliable way to transition between -6AN quick-disconnect or hose fittings and barbed hose connections without adapting multiple times. Installation requires standard AN wrench sizes and basic thread sealant or PTFE tape on the male threads; the included washers handle the seal on the bulkhead side. Verify your fuel line barb inner diameter matches 3/8 inch before ordering to ensure proper hose fit and no leakage.