E-z Lok 303-8 Thread Locking Insert 1/2-13 Unc Stainless

Product Description

The E-Z LOK 303-8 is a self-locking threaded insert designed to create a strong, permanent internal thread in parent material that accepts a standard tap. The insert features a 1/2-13 internal thread and a 3/4-10 external thread, both UNC standard, with an overall length of 21/32 inches (0.656 inches decimal). Manufactured from grade 303 stainless steel with a bright finish, it delivers corrosion resistance and a tensile strength of 22,653 pounds. Licensed tradespeople use this insert when repairing stripped threads or installing a smaller internal thread into a larger tapped hole.

This insert is suited for use in metal fabrication, mechanical maintenance, and industrial repair applications where a reliable UNC internal thread is required in steel, aluminum, or other machinable base materials. It is installed using a standard tap drill and driver, making it a straightforward replacement or thread-repair solution in both shop and field environments. The self-lock wall design resists rotation and pullout under load, making it appropriate for bolted joints subject to vibration or repeated assembly cycles.

Key Features

• 1/2-13 internal thread (Class 2B fit) accepts standard 1/2-13 fasteners
• 3/4-10 external thread (Class 2A fit) installs into a standard 3/4-10 tapped hole
• Self-lock wall design resists rotation and pullout in service
• Grade 303 stainless steel construction with bright finish for corrosion resistance
• Tensile strength rated at 22,653 pounds for high-load bolted connections
• Overall length of 21/32 inches suits standard tap depths in typical parent materials

Compatibility

Designed as an OEM-style replacement or new-installation thread locking insert for applications requiring a 1/2-13 UNC internal thread installed into a 3/4-10 UNC tapped hole in machinable parent material.

Installation Notes

Installation is performed by machinists or maintenance mechanics using a standard tap and the appropriate insert driver. Ensure the parent material is tapped to 3/4-10 UNC before installation. Secure all workpieces and de-energize any associated equipment before beginning thread repair work. Follow applicable facility safety procedures when working with machine tools and cutting fluids.