E-z Lok 329-14 Thread Locking Insert 7/8-9 Unc

Product Description

The E-Z LOK 329-14 is a self-lock wall thread locking insert designed to create a strong, vibration-resistant threaded connection in parent material that requires a larger external thread to anchor it securely. Machined from C12L14 carbon steel with a smooth, rolled finish, this insert features a 7/8-9 UNC internal thread and a 1-1/4-7 UNC external thread. The overall length is 1.125 inches. It is installed by trade professionals and maintenance technicians working with bolted assemblies where thread retention and resistance to loosening under load are critical requirements.

This insert is suited for use in metalworking, industrial maintenance, and mechanical assembly applications where a stripped or undersized threaded hole must be restored or reinforced to accept a 7/8-9 fastener. The self-lock wall design mechanically grips the parent material during installation, resisting pullout and rotation. It is compatible with standard UNC tapping procedures using a standard tap type, making it a practical solution for repair and new fabrication work across a range of industries.

Key Features

• 7/8-9 UNC internal thread with Class 2B fit for standard fastener compatibility
• 1-1/4-7 UNC external thread with Class 2A fit for secure engagement in parent material
• Self-lock wall design resists rotation and pullout under vibration and load
• C12L14 carbon steel construction for durability in demanding mechanical environments
• Smooth, rolled finish - installed using a standard tap, no special tooling required
• Overall length of 1.125 inches provides solid thread engagement depth

Compatibility

Designed as an OEM-style thread repair and reinforcement insert for use in parent materials tapped to accept a 1-1/4-7 UNC external thread, compatible with standard UNC fastener systems requiring a 7/8-9 internal thread.

Installation Notes

Installation is typically performed by machinists, maintenance technicians, or mechanical tradespeople. The parent material must be tapped to the correct 1-1/4-7 UNC specification using a standard tap before the insert is driven in. Ensure the workpiece is secured and the bore is clean and free of debris before installation. Follow the insert manufacturer's installation procedure and use appropriate thread-locking or retention methods if required by the application.