Female Straight Union Ad apter; Size: -3AN

The Female Straight Union Adapter in -3AN size by VIBRANT PERFORMANCE is an essential hydraulic fitting for custom fuel, coolant, and brake line systems in performance vehicles and engine builds. This adapter serves as a connector between two female AN-threaded hoses or components, making it indispensable for builders who need flexible routing in tight engine bays or who are retrofitting fuel injection, turbocharger cooling loops, or upgraded brake systems. Whether you're fabricating a custom fuel rail, integrating a remote oil filter setup, or plumbing a nitrous oxide system, the -3AN straight union provides a leak-free, vibration-resistant junction point that professional fabricators and serious enthusiasts rely on.

Manufactured to VIBRANT PERFORMANCE's exacting standards, this -3AN female straight union adapter uses precision-machined aluminum or steel construction to handle high-pressure applications without deflection or failure. The straight-through bore minimizes turbulence and pressure drop—critical when feeding a fuel system under load or managing coolant flow at elevated temperatures and PSI. The female SAE straight thread (FNPT) design seats cleanly with standard -3AN male fittings, ensuring a positive lock that resists vibration-induced loosening common in engine compartments subject to thermal cycling and mechanical stress. Vibrant's reputation for quality ensures dimensional accuracy and material consistency across every unit.

This fitting suits builders and mechanics upgrading fuel delivery on carbureted conversions, EFI retrofits, or turbocharged platforms where stock plumbing won't handle increased flow demands. It's equally at home in custom cooling circuits, remote catch-can lines, or any modular hydraulic system where two female-threaded components must join in a straight run. Installation is straightforward—hand-tighten to finger-tight, then wrap the threaded portion with PTFE thread seal tape and torque per your system's pressure rating (typically 15–25 ft-lbs for -3AN). Ensure all mating surfaces are clean and free of debris to maintain seal integrity across repeated heat cycles. Compatible with all standard -3AN male fittings and hose ends.