E-z Lok 500-4 Thread Insert Installation Tool 5/16-18 M8

Product Description

The E-Z LOK 500-4 is a hand installation tool designed for driving threaded inserts into pre-tapped holes without power tools. Built from steel, this insert tool provides the control and feedback that press-fit and threaded insert installation requires. It supports three thread sizes: 5/16-18 UNS, 5/16-24 UNS, and M8 x 1.25 metric, making it a practical single-tool solution for jobs that cross between standard and metric fastener specs. Machinists, maintenance technicians, and assembly workers use this tool where power drivers would risk cross-threading or over-driving inserts into soft base materials.

This tool is suited for hand installation of threaded inserts in metalworking, maintenance, and repair applications. It is commonly used on workbenches, in field repair kits, and in production environments where inserts are installed into aluminum, plastic, wood, or other materials that require careful torque management. The dual-standard thread compatibility makes it a convenient fit for shops that work with both inch-series and metric fastener systems on the same assemblies.

Key Features

• Supports 5/16-18 UNS, 5/16-24 UNS, and M8 x 1.25 metric thread sizes in one tool
• Hand-operated design provides tactile control to avoid over-driving inserts
• Steel construction for durability through repeated use
• Compatible with both UNS and metric thread standards
• Lightweight at 0.05 pounds for easy handling and portability

Compatibility

Designed for hand installation of threaded inserts in the 5/16-18, 5/16-24, and M8 x 1.25 thread sizes. Verify insert thread size and standard before use to confirm fitment.

Installation Notes

A licensed machinist or experienced technician should confirm the base material is pre-tapped to the correct thread specification before installation. Ensure the insert is properly aligned with the hole before applying torque to avoid cross-threading. No power tools are required or recommended for use with this hand tool. Keep the work surface stable and apply steady, even hand pressure throughout the driving process.