3/8-24 to #3 Stl Invertd Male Flare Adapter (Pr)

The 3/8-24 to #3 Steel Inverted Male Flare Adapter (Pair) from XRP-XTREME RACING PRODUCTS is a precision hydraulic fitting designed for marine and high-performance boating applications where fuel, oil, and coolant lines demand reliability under pressure. This adapter bridges two different connection standards—converting 3/8-24 inverted flare male ports to #3 AN (Army-Navy) male threads—making it essential for upgrading fuel systems, cooling circuits, and hydraulic assemblies on dual-engine rigs, performance boats, and competition watercraft. Built by racers for demanding conditions, XRP fittings are trusted by anglers and boaters who refuse to compromise on safety or durability where fuel integrity matters most.

Each adapter in this pair is forged from nickel-plated steel, chosen for corrosion resistance in saltwater and freshwater environments alike. The inverted flare design on the 3/8-24 side creates a mechanical seal that tightens under pressure—critical for preventing fuel weeping and system leaks at high RPM. The #3 AN male outlet threads onto standard -3 AN fittings and hardline systems common in modern marine engines, allowing seamless integration with aftermarket fuel rails, fuel pressure regulators, and inline filters. Nickel plating protects against rust and galvanic corrosion without compromising thread strength, ensuring long service life in spray, rain, and saltwater exposure.

This pair adapter suits boaters upgrading from original equipment to performance fuel systems, those retrofitting vintage engines with modern fuel management, and anyone consolidating mismatched port sizes in a single circuit. Installation requires only standard wrenches and Teflon tape or thread sealant on AN threads; the straightforward geometry eliminates flow turbulence. Compatibility with 3/16-inch hardline tubing and metric inverted flare standards makes this fitting a must-have for transmission cooler lines, intercooler circuits, and auxiliary fuel tanks on bass boats, offshore rigs, and ski boats running high-displacement engines.