#3 Union Fitting

The #3 Union Fitting is a precision hydraulic and pneumatic adapter designed for systems requiring a straight connection between two 3 AN male ports. Built for high-performance applications in racing, off-road, and custom fabrication environments, this fitting ensures leak-free fluid transfer in fuel systems, oil lines, and pressurized circuits. The union design allows both connections to be made simultaneously, eliminating the need for separate male-to-female adapters and reducing assembly complexity.

Engineered from aerospace-grade aluminum and finished in durable blue anodized coating, this adapter resists corrosion and oxidation while maintaining structural integrity under high-pressure conditions. The straight configuration provides unobstructed flow and minimal pressure drop, critical in fuel-injection and turbo systems where consistent delivery matters. Precision-machined internal passages and JIC-compliant threads ensure positive sealing when paired with appropriate O-ring or tape sealants, meeting SAE J518 standards for AN fittings.

This fitting is ideal for builders and technicians working on custom fuel systems, intercooler setups, and hydraulic brake upgrades where port-to-port connections need to be compact and reliable. The lightweight aluminum construction (0.03 lbs) and compact dimensions make it suitable for engine bays and chassis applications where space is limited. Compatibility extends across any system using 3 AN porting, including carbureted performance engines, EFI conversions, and race vehicle builds. Installation requires standard SAE wrenches and proper torque procedures to ensure optimal sealing without thread damage.