Single Male Banjo Adaptr Bolt M12x1.0 to -4AN

The Single Male Banjo Adapter Bolt M12x1.0 to -4AN from VIBRANT PERFORMANCE is a precision hydraulic fitting designed for builders and mechanics who demand clean, leak-free connections in custom fuel, oil, and brake line applications. This adapter bridges the gap between metric ISO banjo bolt ports and AN (Army-Navy) standard hose ends, making it essential for swapped engines, fuel system upgrades, and performance modifications where OEM fittings won't accommodate aftermarket components. Whether you're running a turbo fuel system, integrating a remote oil cooler, or plumbing a custom brake line layout, this adapter eliminates improvisation and delivers professional-grade reliability.

Manufactured to strict tolerances, the M12x1.0 to -4AN adapter converts a metric male banjo bolt thread into a -4 AN female port, allowing you to thread standard AN hose fittings directly into metric boss locations. The -4 designation represents 1/4-inch nominal hose compatibility, a common flow rate for fuel delivery and oil circulation circuits in street and race applications. VIBRANT PERFORMANCE engineers these adapters from aluminum or zinc-plated steel, ensuring corrosion resistance and lightweight construction without sacrificing structural integrity. Proper installation—with crush washers on the banjo bolt sealing surfaces and thread-sealant tape on AN connections—guarantees a pressure-tight seal that holds across thermal cycles and vibration.

This fitting is ideal for LS engine swaps, JDM integrations, turbo conversions, and any project where you need to tap into metric block ports for external fuel regulation, boost-referenced fuel pressure senders, or oil supply and return lines to remote components. Mechanics working with forced induction systems, standalone ECU tuning platforms, and custom cooling loops will find this adapter invaluable for maintaining hose routing flexibility without resorting to crimped hose or hard-line fabrication. Install with thread sealant and verify all connections under pressure before full operation to ensure safety and longevity in high-performance applications.