E-z Lok 319-820 Thread Locking Insert 1/2-20 X 5/8-11 Unf

Product Description

The E-Z LOK 319-820 is a self-lock wall thread locking insert designed to create a secure, vibration-resistant threaded connection in carbon steel base materials. It features a 1/2-20 UNF internal thread and a 5/8-11 external thread, allowing it to be driven into a standard tapped hole to provide a stronger, locking internal thread. The insert is manufactured from C12L14 carbon steel with a smooth, rolled finish and measures 0.62 inches in overall length. Licensed trades and maintenance professionals use this type of insert when original threads have stripped or when a locking thread is required in a structural or mechanical assembly.

This insert is suited for use in mechanical, industrial, and trade-service applications where thread integrity and vibration resistance are critical. The 5/8-11 external thread is installed into a standard tapped hole using a driving tool compatible with the self-lock wall installation method. The 1/2-20 UNF internal thread accepts standard Grade 2 and above fasteners with a 2B class of fit, making it a practical solution for repair or new-construction threading situations in steel assemblies.

Key Features

• 1/2-20 UNF internal thread with 2B class of fit for standard fastener compatibility
• 5/8-11 external thread with 2A class of fit for installation into a standard tapped hole
• Self-lock wall design resists loosening under vibration and dynamic loads
• C12L14 carbon steel construction for strength and machinability
• Smooth, rolled finish on external thread for clean installation
• Overall length of 0.62 inches for compact fitment in shallow-bore applications

Compatibility

Designed for use in standard tapped holes requiring a 5/8-11 external thread entry and a 1/2-20 UNF internal thread output, compatible with standard tap type installations in carbon steel and similar base materials.

Installation Notes

Installation is typically performed by a machinist or maintenance technician using a standard driving tool appropriate for self-lock wall inserts. The receiving hole must be tapped to 5/8-11 before insert installation. Ensure the workpiece is secured and de-energized or de-pressurized as applicable before beginning thread repair work. Follow applicable mechanical and structural codes for the assembly in which the insert is being used.