Fragola -3AN Nut x -4AN Male Flare Expander

When you're building or modifying a fuel system, oil cooler lines, or any other fluid transfer setup, you often run into situations where you need to adapt different fitting sizes. This Fragola expander fitting is designed to help you connect a hose end with a -3AN nut to a component that has a -4AN male flare inlet. It's a straightforward way to bridge that size gap without needing to replace existing components.

This fitting is made from aluminum, which keeps the overall weight down on your custom lines. The -3AN nut side threads onto your hose end, and the -4AN male flare side then seats into the corresponding female flare on your fuel rail, pump, or other fitting. It’s a common piece to have on hand when you’re piecing together custom plumbing for your project.