E-z Lok 319-8 Thread Locking Insert 1/2-13 X 5/8-11 Unc

Product Description

The E-Z LOK 319-8 is a self-locking threaded insert manufactured from C12L14 carbon steel, designed to create strong, vibration-resistant thread engagement in parent materials that require a larger external thread than the desired internal thread. The insert features a 1/2-13 internal thread with a 5/8-11 external thread, both in the UNC thread standard. At 0.62 inches in overall length, it installs using a standard tap and provides a tensile strength of 21,201 pounds. The smooth, rolled finish supports clean installation into pre-tapped holes. These inserts are used by maintenance technicians, millwrights, and mechanical contractors working on structural assemblies and industrial equipment.

The 319-8 is suited for applications where a UNC 1/2-13 threaded connection is needed in a larger host thread of 5/8-11. Common use cases include thread repair in ferrous and non-ferrous base materials, anchor points in fabricated steel assemblies, and original-equipment installations requiring reliable thread locking in high-vibration environments. The self-lock wall design provides resistance to loosening without the need for adhesive compounds. This insert is appropriate for both original assembly and field repair work in industrial and commercial maintenance contexts.

Key Features

• 1/2-13 internal thread with 5/8-11 external thread for step-down thread engagement
• Self-lock wall design resists vibration-induced loosening without adhesives
• C12L14 carbon steel construction with smooth, rolled finish
• 21,201 pound tensile strength for high-load applications
• UNC thread standard with 2B internal and 2A external class of fit
• 0.62 inch overall length installs with a standard tap - no special tooling required

Compatibility

Designed as an OEM-style threaded insert for use in applications requiring a UNC 1/2-13 internal thread installed via a 5/8-11 external thread. Compatible with standard UNC taps as specified for the 5/8-11 external thread size.

Installation Notes

Installation is performed by machinists, millwrights, or maintenance technicians using a standard tap sized for the 5/8-11 external thread. Ensure the host material is properly tapped and free of debris before driving the insert. De-energize or lock out any equipment before performing thread repair or insert installation on machinery. Do not exceed the rated tensile load for the insert when specifying fastener engagement depth.