-8an Bulkhead Fitting

The Aeromotive -8AN bulkhead fitting is a straight-through fuel line connector engineered for high-performance fuel cell and tank installations where space is limited or dual-sided access is required. This fitting serves as a critical junction point in custom fuel system builds, allowing clean, leak-free connections through bulkheads, firewalls, or fuel cell sidewalls. As a mechanic working with aftermarket fuel systems—whether for forced-induction builds, fuel cell conversions, or custom race applications—you'll recognize this as an essential component for systems demanding reliable pressure retention and precise flow routing without external fittings or adapters protruding into engine bays.

Built from aircraft-grade aluminum and finished in black anodize, the -8AN bulkhead fitting features 8 AN male threads on both the inlet and outlet sides, with a jam nut and washer assembly that seals against the bulkhead surface from both sides. This double-male configuration eliminates the need for separate hose barbs on each end—your fuel line connects directly via AN fittings, creating a compact, vibration-resistant joint. The black anodized finish provides corrosion resistance and a clean aesthetic while maintaining the structural integrity required for high-pressure fuel systems. The jam nut design ensures the fitting stays secure during installation and remains stable through years of thermal cycling and vibration exposure common in modified vehicles.

This fitting is ideal for fuel cell installations, custom fuel tank builds, and any application where you're routing fuel lines through firewalls or structural bulkheads and need a clean, minimal-footprint solution. It pairs seamlessly with Aeromotive fuel pumps, regulators, and distribution blocks commonly found in EFI conversions and performance fuel system upgrades. Installation requires drilling a hole sized to the fitting's OD, inserting the fitting, and hand-tightening the jam nut from both sides until snug—no special tools required. Compatibility is universal across any fuel system using -8AN hose and fittings, making it an essential inventory item for shops specializing in custom fuel system fabrication or fuel cell integrations on street and race builds.