#3 X 1/4 MPT 90-Degree Adapter Fitting

The #3 X 1/4 MPT 90-Degree Adapter Fitting by FRAGOLA is an essential plumbing component for any serious automotive fluid system build, from custom fuel lines to hydraulic brake circuits and transmission cooling loops. This fitting bridges a critical gap when your hose barb size doesn't match your threaded port—a common challenge when retrofitting aftermarket fuel rails, radiators, or performance brake systems into custom engine bays. Whether you're building a street rod, race car, or modifying a stock platform with aggressive cooling or fuel management upgrades, having the right adapter fittings on hand prevents costly delays and ensures leak-free connections under pressure.

This adapter features a 90-degree angle configuration that allows you to redirect flow at a right angle, critical for tight engine bay layouts where straight fittings won't fit. The #3 hose barb (5/16-inch ID tubing connection) mates to a 1/4-inch male pipe thread (MPT) port, enabling smooth transitions between SAE hose standards and NPT-threaded components. FRAGOLA's precision engineering ensures consistent wall thickness and bore diameter, minimizing turbulence and pressure drop across the fitting—important when every PSI counts in fuel delivery or brake pressure applications. The compact 0.03 lb weight and compact footprint make it ideal for space-constrained engine compartments where every millimeter of clearance matters.

Professional mechanics and enthusiasts building high-performance fuel systems, custom cooling setups, or billet intake manifolds rely on FRAGOLA adapters for their reliability and precision fitment. This 90-degree configuration is particularly valuable when plumbing fuel pressure dampeners, oil coolers, or transmission heat exchangers into engine bays with limited working space. Verify your port thread size (1/4 MPT) and hose diameter (#3) before ordering to ensure proper fitment; using the correct adapter eliminates the need for expensive custom hose fabrication and guarantees dependable operation in demanding engine conditions.