QSC 5/8 X 5/8-18 Economy 4-Link Rod End Kit

The QSC 5/8 X 5/8-18 Economy 4-Link Rod End Kit is a comprehensive package designed to supply the core pivot hardware for a 4-link suspension build. The kit includes eight rod ends — four right-hand and four left-hand thread — along with eight matching 5/8-18 jam nuts and eight weld-in bungs sized for 1-1/4" OD tubing with 0.120" wall thickness. Every component shares the same 5/8-18 thread pitch, ensuring straightforward assembly and adjustment without the hassle of mixed thread sizes.

The rod end bodies are manufactured from heat-treated C1045 steel, while the balls are precision-ground from 52100 bearing steel — a material widely used in bearing applications for its hardness and wear resistance. Each rod end carries a load rating of 13,540 pounds, making the kit suitable for street-driven vehicles, off-road builds, and general fabrication projects. The inclusion of both left- and right-hand threaded rod ends allows for proper suspension tuning by enabling length adjustments without disassembly. As an economy-tier kit, it provides a cost-effective starting point for builders who need reliable, matched components without the premium price of chromoly or stainless alternatives.