#3 Steel Union

The #3 Steel Union from EARLS is a straight adapter fitting engineered for high-pressure fluid systems in performance vehicles, hydraulic brake lines, and fuel delivery applications. This 3 AN male-to-male connector serves technicians and enthusiasts who need reliable, leak-free unions to join or extend existing hose runs without compromising flow integrity. Whether you're assembling custom brake systems, fuel rails, or cooling circuits, this steel union provides the mechanical simplicity and durability required in demanding automotive environments.

Constructed from hardened steel and finished with zinc plating, the #3 Steel Union resists corrosion and maintains structural integrity under sustained pressure and vibration. The straight-through design eliminates flow restrictions while the 3 AN thread standard (1/4-24 UNF) ensures compatibility with industry-standard hose fittings and adapters. Zinc plating provides both rust protection and a professional appearance, making this fitting suitable for engine bays and visible installations. At just 0.04 lbs with compact dimensions (1.25 x 0.85 x 3.1 inches), this union installs easily in tight spaces without adding unnecessary weight or bulk to your system.

Professional mechanics, race teams, and DIY builders rely on EARLS fittings for their proven track record in motorsports and street applications. Installation is straightforward: hand-thread the male AN connectors into the union body, then use a wrench to snug the connection firmly—avoid over-tightening, which can damage the female threads. This adapter is ideal for bridging gaps between hose segments, connecting manifolds to remote components, or replacing damaged unions in existing systems. Always verify your hose size and AN rating before installation to ensure proper sealing and safe operation.