Straight Bulkhead Adapte -4AN

The Straight Bulkhead Adapter -4AN is a precision hydraulic and pneumatic fitting designed for applications requiring leak-free connections through panel walls or bulkheads. This adapter serves as a critical component in custom fluid systems, fuel injection setups, and pressurized line installations where a straight pass-through connection is essential. Engineers and technicians choose bulkhead adapters to create clean, space-efficient penetrations without requiring extended fittings or complex routing solutions.

Constructed from aluminum and finished in black anodize, this fitting features male 4 AN connections on both sides, allowing identical -4AN hose or line terminations to connect through a barrier surface. The straight bulkhead design means the fitting passes perpendicularly through the panel, with the sealing surface compressed between the panel faces—a configuration that prevents stress on the hose assembly and reduces vibration-induced fatigue. The aluminum body with anodized finish resists corrosion and oxidation while maintaining lightweight properties essential in motorsports and aerospace applications.

This adapter is ideal for custom fuel systems, turbo intercooler lines, transmission coolers, and any plumbing scenario where hose must pass through a firewall, tank wall, or panel without protrusion on either side. Installation requires proper sealing washers and a panel thickness appropriate for bulkhead compression. Users working with -4AN hose assemblies will find this fitting compatible with standard 4 AN male threads and JIC adapter networks commonly found in performance automotive, racing, and industrial hydraulic environments.