10AN Bulkhead Adapter Straight Male Male Black

The 10AN Bulkhead Adapter Straight Male Male Black from REDHORSE PERFORMANCE is a precision-engineered hydraulic fitting essential for custom fuel systems, coolant lines, and high-pressure fluid transfer in modified vehicles. Whether you're building a turbocharged engine bay, installing a remote oil cooler, or routing fuel through a complex custom chassis, this adapter provides the critical connection point where two -10 AN male fittings need to pass through a firewall, frame rail, or sealed bulkhead. Mechanics and fabricators trust bulkhead adapters for their ability to create watertight, leak-proof transitions while maintaining system integrity under pressure.

Machined from aerospace-grade materials with a straight-through bore design, the 10AN male-to-male adapter ensures zero flow restriction and consistent bore diameter matching standard -10 AN hose fittings. The black finish not only provides corrosion resistance in engine compartments exposed to heat cycling and moisture but also maintains a professional appearance in visible custom installations. The straight configuration (as opposed to 90-degree or 45-degree variants) allows for direct inline connections, making it ideal for fuel rails, intercooler return lines, transmission cooler circuits, and any application requiring a compact, reliable pass-through without bends. At just 0.14 lbs and measuring 2.75 × 1.35 × 3.75 inches, it installs easily in tight spaces common to engine bays and custom fabrication projects.

This adapter serves engine builders, performance tuners, and custom fabricators working on LS swaps, twin-turbo conversions, fuel injection retrofits, and show car builds where system separation is critical. Compatibility spans any application using -10 AN (5/8-18 SAE) male threads—a universal standard in modern high-performance and racing hydraulics. Installation is straightforward: thread both male fittings into the adapter body by hand until snug, then use a wrench for final tightening, taking care not to over-torque and crack the fitting. Pair it with quality -10 AN hose or hard line, appropriate sealing compounds, and you'll achieve the sealed bulkhead penetration your custom fuel or cooling system demands.