4AN Bulkhead Adapter Black Male Male Straight

The 4AN Bulkhead Adapter Black Male Male Straight from REDHORSE PERFORMANCE is an essential component for any serious fuel system, coolant line, or hydraulic brake modification. This adapter is engineered for builders who demand reliability in high-flow applications where line-to-component connections must remain leak-proof under pressure. Whether you're fabricating a custom fuel cell setup, upgrading to braided stainless steel lines, or rerouting coolant in an engine bay, this straight bulkhead fitting provides a solid mechanical joint that won't compromise system integrity.

Constructed with precision machining, the 4AN male-to-male configuration allows two AN-rated hose lines or adapters to mate through a single bulkhead panel or mounting block. The straight design eliminates the directional constraints of 90-degree or 45-degree fittings, making it ideal for inline applications where space and flow path are critical. The black anodized finish provides corrosion resistance in harsh underbody environments while maintaining visual consistency with modern performance plumbing systems. REDHORSE Performance's manufacturing standards ensure concentricity and thread quality that prevents seizing and guarantees repeatable pressure retention across countless thermal cycles.

Professional mechanics and engine builders rely on this adapter for custom fuel systems, forced induction cooling loops, and brake system modifications where OEM fittings don't accommodate aftermarket line routing. Its compact profile (2.75 inches long) fits tight engine bays without requiring elbow room, and the lightweight design (0.06 lbs) makes it ideal for weight-conscious builds. Installation requires only standard AN wrench sizes and compatible PTFE thread sealant for leak-free assembly. This fitting is fully compatible with standard 4AN hoses and adapters, making it an essential inventory item for shops specializing in fuel system upgrades or complete hydraulic system retrofits.