Bulkhead Nut 6an (2pk)

The Bulkhead Nut 6AN (2pk) from EARLS is an essential component for high-performance fuel, oil, and coolant line systems in custom and modified vehicles. These precision-engineered fittings are built to secure bulkhead connections where AN hose lines pass through firewalls, engine blocks, or custom fabricated manifolds. Whether you're upgrading to an aftermarket fuel system, installing a remote oil cooler, or building a custom turbo setup, reliable bulkhead fittings are non-negotiable for system integrity and leak prevention.

EARLS bulkhead nuts are manufactured to strict aerospace-grade specifications, ensuring consistent thread engagement and secure sealing under pressure and vibration. The 6AN designation refers to the industry-standard AN fitting size, compatible with 6AN hose and adapter systems used throughout motorsports and performance automotive applications. These nuts feature precision-cut threads and durable construction designed to withstand repeated vibration cycles, thermal cycling, and high-pressure fluid dynamics without loosening or thread stripping—critical when fuel systems operate at 40+ PSI or oil cooler circuits demand reliability under sustained engine loads.

Mechanics and fabricators rely on EARLS bulkhead nuts for custom fuel system builds, turbo installations, supercharger plumbing, and remote cooler setups in street cars, track vehicles, and engine swaps. The two-pack format covers a typical dual-line installation or provides a spare for future modifications. Installation requires a standard AN wrench set and compatibility with existing 6AN bulkhead adapters; proper torque and thread-sealant application ensure leak-free operation for thousands of miles.