3/4-16 LH Tube End 1-3/4in x .120

The 3/4-16 LH Tube End 1-3/4in x .120 from MEZIERE is a precision weld-on fitting engineered for custom cooling systems, fuel lines, and high-performance hydraulic applications. This left-hand threaded tube end accepts tubing with a 1-3/4-inch outer diameter and 0.120-inch wall thickness, making it ideal for fabricators and engine builders who demand exact fitment in tight engine bay layouts. Whether you're building a custom radiator setup, constructing a complex coolant circuit, or assembling specialty motorsports plumbing, this tube end delivers the reliability and accuracy required for professional-grade work.

Manufactured from chromoly steel in a natural (unplated) finish, the 3/4-16 LH Tube End provides superior strength and heat resistance compared to standard steel alternatives. The 3/4-16 left-hand female thread allows for secure connection with matching left-hand male studs or fittings, a critical feature in systems where vibration and thermal cycling demand fail-safe retention. The weld-on design integrates directly into your fabrication project—you prepare the tube end by welding it to your tubing assembly, creating a permanent, leak-proof joint that withstands pressure spikes and temperature fluctuations inherent in performance cooling and fuel delivery systems.

This fitting is best suited for custom fabricators, race teams, and enthusiast engine builders who are constructing bespoke cooling systems, fuel injection manifolds, or turbo cooling circuits where standard off-the-shelf solutions don't fit the application. Installation requires TIG or MIG welding expertise; the tube end is positioned and welded to the OD of your 1-3/4-inch tubing, then threaded connections are made to the 3/4-16 female port. Verify that your left-hand threaded studs or adapters match the 3/4-16 specification to ensure proper sealing and maximum system integrity.