#10 Union Fitting

The #10 Union Fitting from FRAGOLA is an essential component for any serious fuel system, coolant line, or hydraulic brake application in automotive builds and restorations. Mechanics and performance enthusiasts rely on union fittings to create secure, leak-free connections between hoses and hard lines without the need for welding or permanent installation methods. This fitting type is particularly valuable when you need quick disconnects, easy service access, or the ability to remove and reconfigure fuel or brake circuits during tuning, engine swaps, or system diagnostics.

FRAGOLA's #10 union fitting delivers reliable, repeatable sealing through precision-engineered cone seating surfaces and carefully controlled thread geometry that prevents both leakage and over-tightening damage. The compact design—measuring 1.55 x 1.5 x 4 inches and weighing just 0.08 lbs—allows installation in tight engine bays where space is critical. By connecting two hose ends or a hose to a line with a single, removable coupling, this fitting eliminates the risk of fuel weeping or brake fluid loss that can occur with inferior connection methods, making it the standard choice across custom fuel systems, EFI conversions, and modified cooling circuits.

Builders installing custom fuel rails, upgrading from carbureted to EFI systems, or fabricating prototype cooling or brake lines will find this #10 union fitting indispensable for quick assembly and future adjustments. It's equally at home in street rods, race cars, and off-road builds where maintainability and reliability matter. Pair it with proper -10 AN hose or tubing and matching male/female adapters to complete your system—always verify thread size and pressure rating against your specific application before installation.