E-z Lok 329-10F Thread Locking Insert 5/8-18 Unf

Product Description

The E-Z LOK 329-10F is a self-locking threaded insert designed to provide a secure, vibration-resistant internal thread in metal assemblies. Featuring a 5/8-18 UNF internal thread and a 7/8-9 external thread, this insert installs into a tapped hole and locks against the parent material wall to prevent rotation and back-out under load. The insert measures 0.687 inches in length and is manufactured from C12L14 carbon steel with a smooth, rolled finish. It is suited for applications where a reliable threaded repair or thread reinforcement is required in steel or similarly hard parent materials. Machinists, maintenance technicians, and mechanical assemblers working in industrial or trade settings are the primary installers.

The 329-10F is used in applications requiring a durable UNF thread insert in metal components subject to vibration, repeated fastener cycling, or torque loading. The self-lock wall design mechanically locks the insert to the parent material, eliminating the need for adhesive retention methods. This insert is appropriate for use in production machining, MRO repair work, and field repair of stripped or damaged threads in carbon steel assemblies. A standard tap compatible with the 7/8-9 external thread is required for proper installation.

Key Features

• 5/8-18 UNF internal thread with a 2B class of fit for standard fastener engagement
• 7/8-9 external thread with a 2A class of fit sized for a standard tap installation
• Self-lock wall design mechanically locks insert to parent material without adhesive
• C12L14 carbon steel construction for strength in metal-to-metal applications
• Smooth, rolled finish on external thread for consistent installation torque
• Insert length of 0.687 inches provides full thread engagement depth

Compatibility

Designed for installation into carbon steel and comparable parent materials tapped to accept a 7/8-9 external thread using a standard tap. No specific model compatibility was provided in the product data.

Installation Notes

Installation is performed by machinists or mechanical technicians using a standard tap to prepare the receiving hole for the 7/8-9 external thread. Ensure the parent material is securely fixtured before tapping to maintain thread alignment. The insert should be driven to the specified seating depth using an appropriate installation tool to fully engage the self-locking wall feature. De-energize or lock out any powered equipment before performing threaded insert repairs on assemblies in service.