#16 Union Fitting

The #16 Union Fitting by FRAGOLA is a straight adapter designed to join two 16 AN male ports in high-pressure fluid systems. This fitting serves as a critical connector in fuel lines, cooling circuits, and hydraulic applications where reliable, leak-free connections are essential. Union fittings allow for tool-free disconnection and reconnection, making them indispensable in performance automotive, racing, and industrial hydraulic setups where maintenance access and serviceability matter.

Constructed from aluminum and finished in blue anodized coating, this fitting provides corrosion resistance while maintaining a lightweight profile—ideal for custom fabrication and weight-conscious builds. The 16 AN designation indicates it accommodates -16 hose or tubing (1 inch nominal outer diameter), rated for demanding pressure environments typical of fuel injection systems, turbo cooling lines, and transmission coolers. Anodized aluminum resists oxidation and offers durability in both engine bay and underbody installations, while the straight-through design eliminates flow restriction and pressure drop across the connection point.

This fitting is ideal for builders and technicians fabricating custom fuel systems, intercooler plumbing, and modular hydraulic circuits where standardized AN connections are already in use. The male-to-male configuration allows it to adapt between two female AN ports or to serve as an extension when coupled with hose fittings. Installation requires no special tools—hand-tight assembly with standard AN wrenches ensures proper sealing through the internal crush washer design, making it suitable for both initial builds and field repairs on race cars, hot rods, and high-performance street vehicles.