Inverted Flare Nut 10pk 3/8-24 for 3/16 Line S/S

The Inverted Flare Nut 10pk 3/8-24 for 3/16 Line S/S from ALLSTAR PERFORMANCE delivers precision-engineered hydraulic and fuel line connections for high-performance racing and automotive applications. These stainless steel inverted flare nuts are essential components for anyone building or maintaining a custom engine bay, fuel system, or brake circuit where secure, leak-free connections are non-negotiable. Designed to work with 3/16-inch hardline tubing, this 10-pack provides the redundancy and spare stock that professional builders and serious enthusiasts require.

Inverted flare fittings create a mechanical seal by compressing the flared tube end against the conical seat inside the nut, producing a connection stronger and more reliable than standard 45-degree flare designs. The 3/8-24 thread pitch is the industry standard for this line diameter, ensuring compatibility with OEM and aftermarket manifolds, adapters, and distribution blocks. Manufactured from stainless steel, these nuts resist corrosion and maintain integrity under extreme engine bay temperatures, fuel exposure, and vibration—critical for both street and track vehicles. The natural finish allows for easy visual inspection of thread quality and fitment during assembly.

Racers, fabricators, and fuel system specialists rely on ALLSTAR PERFORMANCE inverted flare hardware for fuel delivery systems, oil cooler lines, power steering circuits, and hydraulic brake systems where safety and durability cannot be compromised. Installation is straightforward: hand-tighten the nut onto the flared tube end, then snug with a wrench—avoid over-torquing, which can strip threads or crack the flare. This 10-pack format is ideal for complete system builds, repairs, or as a shop staple for ongoing projects where multiple connections are needed.