3/8-24 to #3 Stl Invertd Male Flare Adapter

The 3/8-24 to #3 Steel Inverted Male Flare Adapter is an essential hydraulic and brake line fitting for custom automotive projects, fuel system modifications, and high-pressure fluid transfer applications. This adapter bridges two critical SAE flare standards, allowing technicians and enthusiasts to connect incompatible line sizes without compromising system integrity. Whether you're building a custom fuel delivery system, upgrading brake lines on a classic restoration, or fabricating a custom hydraulic installation, this adapter eliminates the need for expensive complete line replacement or custom machining.

Constructed from hardened steel, the 3/8-24 to #3 inverted male flare adapter features precision-machined threads and flare seats that ensure leak-free connections under high pressure and thermal cycling. The inverted male configuration means the flare seat faces inward, allowing it to mate with standard female flare ports found on fuel rails, brake proportioning valves, and hydraulic accumulators. The 3/8-inch 24-thread-per-inch inlet and #3 outlet sizing (0.1875" diameter nominal) provides reliable flow capacity for both high-volume fuel systems and precision brake line applications. Steel construction resists corrosion and maintains dimensional stability across extreme temperature variations common in engine bays and transmission tunnels.

This adapter serves fabricators working on LS engine swaps, aftermarket fuel system installations, and brake system upgrades on street rods and track vehicles. It's ideal for mechanics transitioning between SAE flare standards when sourcing components from different manufacturers or consolidating multiple line sizes into a single manifold block. Installation requires proper flare nut torque sequencing and thread sealant compatible with your specific fluid type—always verify compatibility with fuel, brake fluid, or hydraulic medium before assembly to prevent seal degradation and system failure.