7/16-20 LH Tube End - 3/4in x .065in

The 7/16-20 LH Tube End - 3/4in x .065in is a precision-engineered weld-on fitting designed for custom radiator, heater, and coolant line fabrication in performance and hot rod applications. This left-hand threaded tube end serves as the connection point between chromoly tubing and compatible hose or component assemblies, offering reliable structural integrity in high-temperature and high-pressure environments. Whether you're building a custom cooling system, upgrading a vintage engine bay, or engineering a bespoke hydraulic line setup, this tube end provides the durable interface needed for leak-free, long-lasting performance.

Manufactured from chromoly steel in its natural finish, the 7/16-20 LH Tube End accommodates 3/4-inch diameter tubing with 0.065-inch wall thickness—a standard specification for mid-range cooling and hydraulic systems. The 7/16-20 left-hand female thread prevents accidental loosening under vibration and rotational forces, a critical safety feature in racing and high-stress applications. The weld-on design allows permanent integration into your tubing assembly via TIG or MIG welding, ensuring a monolithic, vibration-resistant connection that outperforms threaded slip-fits. Its compact footprint (1.2 x 0.85 x 3.05 inches) and minimal weight (0.06 lbs) make it ideal for weight-conscious builds without sacrificing load-bearing capacity.

This fitting is essential for fabricators, engine builders, and restoration specialists who demand OEM-quality tube ends for custom cooling systems, fuel systems, or pneumatic lines. The left-hand thread is particularly valuable in applications where standard right-hand fittings risk unwinding due to system vibration or fluid pressure surges. Installers should verify tubing dimension compatibility (3/4-inch OD, 0.065-inch wall) before ordering, and confirm that the threaded component you're connecting to accepts a 7/16-20 LH female thread. Each unit ships ready to weld, requiring only proper surface preparation and welding technique to ensure a sound, leak-free installation.