12AN Aluminum Tube Nut 3/4in Hard Line Black

The 12AN Aluminum Tube Nut 3/4in Hard Line Black from REDHORSE PERFORMANCE is an essential component for any serious fuel or fluid line system upgrade. Whether you're building a custom engine bay, installing a high-flow fuel system, or upgrading your brake lines for improved response, this tube nut serves as the critical connection point between your hard lines and fittings. Designed for mechanics and enthusiasts who demand reliability under pressure, this fitting ensures leak-free performance in street, track, and competition applications.

Constructed from lightweight aluminum alloy, the 12AN tube nut reduces overall system weight while maintaining structural integrity under sustained hydraulic and fuel pressure loads. The 3/4-inch hard line size accommodates standard -12AN hose and line configurations, providing a precise, vibration-resistant seal when paired with compatible fittings and adapters. The black anodized finish offers superior corrosion resistance compared to raw aluminum, protecting against moisture and chemical degradation in engine compartments and underbody environments. REDHORSE PERFORMANCE's precision engineering ensures concentric thread geometry, eliminating cross-threading and guaranteeing consistent torque values across multiple installation cycles.

This tube nut excels in fuel injection systems, nitrous oxide plumbing, transmission cooler lines, and custom cooling circuits where flow rate and pressure stability matter. Technicians favor REDHORSE fittings for their durability during high-vibration environments—ideal for turbocharged, supercharged, or naturally aspirated engines running sustained boost or high RPM. Installation requires only a wrench and basic line preparation; the 12AN standard ensures compatibility with the vast majority of aftermarket fuel system components, braided hose, and modular hard line kits available today.