QA1 HML3-4SZ H Series 3-Piece Alloy Rod End 3/16in. Bore 1/4-28 LH Male Thread with Stud and Zerk

The QA1 HML3-4SZ is a precision H Series three-piece alloy and chromoly steel male rod end designed for high-load suspension, steering, and industrial linkage applications. Built with left-hand threading and featuring both a stud configuration and an integrated Zerk grease fitting, this rod end delivers easy lubrication access and secure, reliable mounting in demanding environments.

Key Features:

• Three-Piece Alloy/Chromoly Steel Construction – Traditional design engineered for high-load applications that do not side-load the rod end
• 3/16 in. (0.1875 in.) Ball Bore – Precise bore sizing for consistent, repeatable fit
• 1/4 in.-28 Left-Hand Male Thread – LH thread simplifies installation in adjustable-length linkage assemblies
• Stud Configuration (S) – Includes a low carbon steel, protective-coated stud with right-hand threads for versatile mounting options
• Zerk Grease Fitting (Z) – Allows for field lubrication to extend service life and maintain smooth articulation
• 52100 Bearing Steel Ball – Heat treated, hard chrome plated, and precision ground for maximum wear resistance and smooth operation
• Chromoly Steel Body – Heat treated and protective coated for corrosion resistance
• Heat-Treated Throughout – Both ball and body receive heat treatment for enhanced strength and longevity

The QA1 H Series rod ends are recommended for high-load applications across circle track racing, drag racing, street performance, classic muscle cars, and industrial uses. The SZ suffix denotes this unit ships complete with a stud and Zerk fitting installed, making it a ready-to-install solution for custom suspension links, steering components, and fabricated assemblies.