5/8″ Solid Shaft Coupler – Keyed & Locking

A durable 5/8″ solid shaft coupler with a precision keyway and set screws for secure, alignment-free connections—ideal for power tools, industrial machinery, and DIY projects. The C1018 mild steel construction ensures strength and longevity, while the black oxide finish provides corrosion resistance in demanding environments.

This coupler features a 1-1/2″ outer diameter and a 2-1/2″ overall length, designed to fit standard 5/8″ shafts with minimal clearance. The 3/16″ x 3/32″ keyway prevents slippage, and the set screws allow for quick adjustments without tools. Perfect for applications requiring reliable torque transfer, such as conveyor systems, pumps, or custom mechanical assemblies.