#4 > 7/16-24 Calip. Adap

The #4 > 7/16-24 Calip. Adap straight fitting adapter by EARLS is engineered for high-performance hydraulic and fuel line systems that demand precision connection between two different thread standards. This adapter serves as a critical link in custom hardline installations, allowing technicians and enthusiasts to interface AN male fittings with inverted flare male ports without compromise. Whether you're building a race car fuel system, restoring classic automotive hydraulics, or assembling aftermarket brake lines, this adapter ensures leak-free performance under pressure.

Constructed from steel with a zinc oxide finish, the adapter delivers durability and corrosion resistance in demanding underhood environments. The straight configuration eliminates unnecessary bends that can weaken connections or reduce flow efficiency, while the precision-machined male threads on both ends—#4 AN and 7/16-24 inverted flare—guarantee a secure, vibration-resistant fit. The compact 1.25-inch length and minimal weight (0.08 lbs) make it ideal for tight installation spaces typical of modern engine bays and custom fabrication projects. EARLS' reputation for manufacturing excellence ensures dimensional accuracy that meets or exceeds OEM standards.

This adapter is essential for custom builders, restoration specialists, and performance technicians who require compatible fittings across legacy and modern hydraulic standards. It works seamlessly with 1/4-inch hardline tubing assemblies and integrates into fuel delivery, cooling, and brake systems where thread conversion is unavoidable. Installation is straightforward—apply thread sealant to male threads and torque to specification using standard wrenches. Stock this adapter for emergency repairs or order as part of a complete hardline kit to ensure system compatibility and reliability.