Male Adapter Fitting #6 x 1/2-20 5/16 Tube IF

The Male Adapter Fitting #6 x 1/2-20 5/16 Tube IF by FRAGOLA is a precision hydraulic and fuel line connector engineered for high-performance automotive applications where reliability and leak-free operation are non-negotiable. Whether you're building a custom fuel system for a modified engine, installing a turbocharger oil supply line, or upgrading brake hydraulics in a track car, this adapter serves as the critical junction point between hardline and flexible tubing. FRAGOLA fittings are trusted by professional fabricators, engine builders, and restoration specialists who demand OEM-quality standards in their custom plumbing systems.

This male adapter features a #6 JIC port (3/8-inch diameter) on one end and a 1/2-20 ISO male thread with a 5/16-inch tube connection on the other, delivering the versatility needed in modern engine bay layouts. The dual-thread design—combining JIC and ISO specifications—ensures compatibility across domestic and international fuel, oil, and coolant systems without requiring multiple adapter assemblies. Forged from aerospace-grade materials and precisely honed to eliminate micro-porosity, the fitting maintains integrity under sustained pressure cycles, thermal cycling, and vibration, critical factors in turbocharged or supercharged applications where system pressures frequently exceed 80 PSI.

Fabricators and engine builders rely on this adapter when consolidating or rerouting fuel rails, oil cooler lines, and power steering returns in chassis conversions or engine swaps. The compact footprint (0.75 x 0.75 x 1 inch) allows installation in tight engine bays where space constraints rule out bulkier fittings, while the precise 1/2-20 thread pitch ensures hand-tight-plus-one-wrench-turn installation without risk of stripping. Compatible with SAE J518 and ISO 1219 hydraulic systems, this FRAGOLA fitting is ideal for EFI fuel systems, LS engine conversions, and any custom application demanding industry-standard, field-proven connectors that won't leak or fail under sustained performance use.