#6 Male to 3/8in NPT Ano-Tuff Adapter

The #6 Male to 3/8in NPT Ano-Tuff Adapter from EARLS is a precision straight-port fitting designed to bridge metric AN (Army Navy) hydraulic lines to standard NPT (National Pipe Thread) ports. This adapter is essential for custom fluid systems, performance fuel delivery setups, brake lines, and cooler installations where direct thread compatibility between AN and NPT connections is required. Built for professional technicians and serious enthusiasts, this fitting eliminates the need for multiple adapters or incompatible connections.

Constructed from aluminum and finished in black anodized coating, the #6 Male to 3/8in NPT Ano-Tuff Adapter delivers corrosion resistance and durability in high-vibration engine bay environments. The anodized treatment protects against oxidation while maintaining a clean aesthetic under the hood. As a straight adapter—meaning inlet and outlet align on the same axis—it minimizes system complexity and reduces potential leak points. The male AN #6 end accepts standard -6 hose fittings, while the 3/8 inch NPT port threads into factory or aftermarket NPT-threaded components with full sealing integrity.

This fitting is ideal for fuel system conversions, cooling system modifications, and hydraulic brake upgrades where OEM NPT connections must accommodate AN-style hose routing. Compact dimensions (1.5 x 0.85 x 3.05 inches) allow installation in tight engine compartments without sacrificing flow or reliability. Thread-in installation is straightforward; apply appropriate thread sealant to the NPT port and torque to secure. Whether upgrading a classic hot rod, modernizing a race platform, or troubleshooting cross-platform fluid line compatibility, this EARLS adapter provides the dependable connection quality that professionals specify.