6AN Union Adapter AN/JIC Flare 90

The 6AN Union Adapter AN/JIC Flare 90 is an essential fluid line coupling component designed for high-performance automotive fuel, oil, and coolant systems. If you're building a custom engine bay, upgrading your fuel delivery system, or installing aftermarket gauges and cooling circuits, this adapter serves as the critical junction where multiple braided hoses or hard lines meet. Whether you're fabricating a fuel system for a modified street engine, a track car, or a classic restoration with modern plumbing, this 90-degree adapter ensures leak-free, vibration-resistant connections that won't fail under pressure.

This adapter features AN (Army-Navy) standard JIC (Joint Industry Council) 37-degree flare threads, the industry benchmark for motorsport and performance applications. The 90-degree union design allows you to change flow direction while maintaining a single connection point, reducing clutter in tight engine compartments and simplifying plumbing layouts on custom builds. The compact 2.8 × 1.1 × 3.8-inch profile and lightweight 0.07 lbs construction make installation straightforward without adding unnecessary weight—critical in competitive or high-performance vehicles where every ounce matters. The flare design creates a metal-to-metal seal superior to O-ring adapters, providing superior vibration damping and reliability under thermal cycling and pressure spikes.

Mechanics and fabricators working on fuel system upgrades, turbo coolant lines, or gauge line routing will find this 6AN adapter indispensable for custom hose runs that require directional changes. It's compatible with all standard 6AN braided hose, -6 hard lines, and gauge adapters using AN/JIC flare fittings. Installation is straightforward: slide the flared end of your hose onto the adapter threads, hand-tighten, then torque to 12–18 foot-pounds with a wrench on both hex heads to lock everything in place. This adapter is suited for fuel systems up to 100+ psi, oil lines, and coolant circuits, making it a versatile choice for street builds, race engines, and restoration projects alike.