#6 Flare to 3/8 NPT Adptr w/ Female 1/8 NPT

The #6 Flare to 3/8 NPT Adapter with Female 1/8 NPT (SKU RUS670060) is a precision fluid-line fitting designed for custom fuel, coolant, and brake system modifications on performance and restoration vehicles. This adapter bridges incompatible port sizes and thread standards, making it essential for engine bay rewiring and fuel system upgrades where original equipment fittings won't accommodate aftermarket components or custom tuning configurations.

This adapter converts a #6 SAE flare fitting (common on older carbureted engines and traditional fuel lines) to a 3/8-inch NPT port while simultaneously providing a female 1/8 NPT outlet for sensor installation or auxiliary line branching. The dual-thread design eliminates the need for multiple fittings and adapters, reducing leak points and simplifying plumbing layouts in tight engine compartments.

Mechanics performing fuel system conversions—particularly those upgrading carbureted or older fuel-injected engines to modern EFI platforms—will find this fitting indispensable for manifold pressure lines, fuel pressure regulators, and gauge sender connections. The compact 2.7-inch length fits within confined engine bays without requiring extended hose runs that compromise aesthetics or create pressure drop in fuel delivery.