Brake Line Adapter -4 to 3/16 Inv Flare 10pk

The Brake Line Adapter -4 to 3/16 Inv Flare 10pk by ALLSTAR PERFORMANCE is a precision hydraulic fitting system engineered for professional automotive and motorsports applications where reliable brake pressure transmission is non-negotiable. Built in sets of ten, this adapter pack addresses the critical need for compatible brake line connections in high-performance vehicles, race cars, and custom builds where OEM fittings don't align with aftermarket brake systems. Whether you're upgrading to a custom brake setup, fabricating a tube-and-tubing brake circuit, or maintaining fleet vehicles, these adapters ensure leak-free pressure delivery under extreme thermal and mechanical stress.

Each adapter features black anodized aluminum construction, delivering corrosion resistance and durability in underhood environments where moisture and salt exposure accelerate degradation. The -4 AN (male) to 3/16 inch inverted flare (male) configuration bridges metric and SAE brake line standards, a common requirement in hybrid builds and international vehicle imports. Inverted flare fittings create a cone-shaped seal that distributes clamp load evenly, reducing stress concentrations that lead to fitting failure under 1000+ PSI brake system pressures—critical in race and heavy-duty applications. The aluminum body minimizes weight while maintaining structural integrity, and the anodized finish provides additional thermal barrier properties and aesthetic consistency.

This 10-pack is ideal for technicians, fabricators, and enthusiasts who maintain multiple vehicles or execute complex brake system modifications where spare fittings prevent downtime and system redesigns. Installation requires standard flare wrenches and careful torque application to avoid thread stripping; cross-compatibility verification with your specific brake line tubing and component ports is essential before assembly. The compact 4.4 x 2.3 x 4.7 inch package and minimal 0.45 lb weight make this set easy to stock in shop toolkits or vehicle emergency kits. Compatible with all inverted flare brake line systems and AN port–equipped master cylinders, proportioning valves, and wheel cylinders used in performance, restoration, and commercial vehicle applications.