E-z Lok 329-6 Thread Locking Insert 3/8-16 Unc Self-lock

Product Description

The E-Z LOK 329-6 is a self-locking threaded insert designed for permanent, high-strength thread repair and reinforcement in carbon steel base materials. It features a 3/8-16 internal thread and a 9/16-12 external thread, both to UNC standard, with an overall length of 33/64 inches (0.515 inches). The insert is manufactured from C12L14 carbon steel with a smooth, rolled finish, and its self-lock wall design resists loosening under vibration and dynamic loading. Mechanical and maintenance technicians install this type of insert where stripped or worn internal threads require a reliable OEM-grade fix without full part replacement.

This insert is suited for use in ferrous metal assemblies across industrial, commercial, and maintenance applications. The self-lock wall configuration engages the parent material during installation to resist rotation and pull-out, making it appropriate for high-cycle or high-vibration environments. It is installed using a standard tap for 9/16-12 UNC external thread preparation. A minimum order quantity of 10 units applies, and the package quantity is 1 per unit sold.

Key Features

• 3/8-16 internal thread (2B class of fit) for standard fastener compatibility
• 9/16-12 external thread (2A class of fit) for installation into a standard tapped hole
• Self-lock wall design resists rotation and loosening under vibration
• Tensile strength rated at 12,425 pounds
• C12L14 carbon steel construction with smooth rolled finish
• Overall length of 33/64 inches (0.515 inches) for compact installations

Compatibility

Designed as an OEM-style threaded insert for carbon steel base material applications requiring a 3/8-16 UNC internal thread with a 9/16-12 UNC external thread installation profile. Use a standard tap for hole preparation prior to installation.

Installation Notes

Installation is typically performed by machinists, maintenance technicians, or mechanical contractors. The parent material must be tapped to 9/16-12 UNC specification before driving the insert. Power down all relevant equipment and secure workpieces before beginning thread preparation. Do not exceed the designed installation torque for the insert size, and verify hole depth and thread engagement length prior to final assembly.