E-z Lok 319-M8 Thread Locking Insert M8 X 1.25 Self-lock

Product Description

The E-Z LOK 319-M8 is a self-lock wall thread locking insert designed to create a secure, permanent internal thread in a tapped hole. The insert features an M8 x 1.25 internal thread and a 7/16-14 external thread, allowing it to be driven into a pre-tapped hole using a standard tap. Manufactured from C12L14 carbon steel with a smooth, rolled finish, this insert delivers reliable thread locking performance in metal assemblies. At 0.4370 inches in overall length, it is suited for compact fastening applications where holding strength and thread integrity are critical requirements.

This insert is used in industrial, mechanical, and maintenance applications where a threaded hole must be locked against loosening from vibration or torque. Typical installation scenarios include machine frames, equipment enclosures, and structural assemblies that require a dependable internal thread anchor. It is installed by trade professionals including millwrights, machinists, and maintenance technicians working with carbon steel components and standard threaded fastener systems.

Key Features

• M8 x 1.25 internal thread with Class 2B fit for standard metric fastener engagement
• 7/16-14 external thread with Class 2A fit installs into a standard tapped hole
• Self-lock wall design resists loosening under vibration and dynamic loads
• C12L14 carbon steel construction provides solid mechanical strength
• Smooth, rolled finish on exterior thread for consistent installation torque
• Compatible with standard tap type - no specialty tooling required

Compatibility

Designed as an OEM-style replacement or new-installation thread locking insert for carbon steel assemblies requiring an M8 x 1.25 internal thread driven by a 7/16-14 externally threaded insert body.

Installation Notes

Installation is performed by machinists or maintenance technicians using a standard tap sized for the 7/16-14 external thread prior to driving the insert. Ensure the host material hole is properly tapped and free of debris before installation. De-energize or lock out any equipment before servicing threaded fastener assemblies per applicable safety standards. Do not exceed the rated thread engagement depth for the host material thickness.