3/8in female Pipe To #6 Flare

The AEROQUIP 3/8in Female Pipe to #6 Flare adapter is an essential hydraulic and pneumatic line connector for serious vehicle builders and performance mechanics. This adapter bridges two common industrial fluid-transfer standards—NPT (National Pipe Thread) and SAE flare—allowing you to integrate components from different manufacturers into a cohesive fuel, oil, or coolant system.

Manufactured by AEROQUIP, a trusted name in hose and fitting assemblies, this adapter features a 3/8-inch female NPT port on one end and a #6 SAE 45-degree flare connection on the other. The female pipe thread accepts standard male NPT fittings without requiring additional adapters, while the flare interface creates a metal-to-metal seal that resists vibration and pressure cycling—critical in high-performance applications where safety and leak prevention are non-negotiable.

This adapter is ideal for engine swaps, fuel system upgrades, and custom plumbing where existing components use mismatched connection standards. Mechanics and fabricators working on vintage restorations, turbo installations, or custom cooling circuits will find this fitting to be a reliable solution for their needs.