#12 To #4 Union Adapter

The AEROQUIP #12 To #4 Union Adapter serves as a critical plumbing component for high-performance fluid systems requiring a precise reduction in line size. Designed for professionals and enthusiasts working with custom fuel, oil, or coolant configurations, this straight adapter allows for a secure transition between -12 AN and -4 AN male fittings. By utilizing this union, users can maintain system integrity while adapting different hose diameters to meet specific flow requirements in demanding environments. This versatility makes it an essential piece of hardware for complex plumbing projects where space and weight are primary considerations.

Constructed from lightweight yet durable aluminum, this AEROQUIP #12 To #4 Union Adapter features a blue anodized finish for superior corrosion resistance and long-term reliability. The precision-machined threads ensure a leak-free seal when paired with compatible 37-degree flare fittings, which is essential for maintaining pressure in hydraulic or fuel transfer applications. Its robust design is engineered to withstand the vibrations and thermal cycling typically encountered in high-stress mechanical systems. This high-quality construction prevents thread galling and ensures the fitting can be reused across multiple builds if necessary.

Whether you are completing a custom engine build or maintaining industrial fluid hardware, the AEROQUIP #12 To #4 Union Adapter provides the necessary compatibility for complex plumbing layouts. This fitting is sold individually and is ideal for those looking to buy reliable specifications for high-pressure fluid management and automotive performance. Installation is straightforward, requiring standard wrenches to achieve the proper torque for a permanent, secure connection across various fluid types including oil, fuel, and water. Using genuine Aeroquip components ensures that your system meets the rigorous standards required for competitive use and heavy-duty service.