E-z Lok 453-5 Thread Locking Insert M5 X 0.8 Stainless

Product Description

The E-Z LOK 453-5 is a self-lock wall thread locking insert manufactured from 303 stainless steel with a bright finish. It provides an M5 x 0.8 internal thread and an M8 x 1.25 external thread, both to metric coarse standards. The insert measures 7.5 mm in overall length and is rated to a tensile strength of 4,056 pounds. Internal thread class of fit is 6H and external is 6G, meeting standard metric tolerance specifications. This type of insert is installed by machinists, maintenance technicians, and assembly professionals to create or restore durable threaded connections in parent materials that require a locking mechanism against vibration or rotation.

This insert is suited for applications in metal fabrication, industrial machinery, and mechanical assemblies where a vibration-resistant threaded connection is required. The self-lock wall design grips the parent material and resists back-out under dynamic or cyclic loads. It is appropriate for use in aluminum, cast iron, and similar host materials where thread strength or repair is needed. A standard tap is used to prepare the receiving bore prior to installation.

Key Features

• M5 x 0.8 internal thread with 6H class of fit
• M8 x 1.25 external thread with 6G class of fit
• Self-lock wall design resists rotation and back-out under vibration
• 303 stainless steel construction with bright finish for corrosion resistance
• 4,056 pound tensile strength rating
• Compatible with standard tap preparation - no special tooling required for bore prep

Compatibility

Designed as an OEM-style replacement or new-installation thread locking insert for metric coarse threaded applications requiring an M5 internal thread in an M8 tapped bore.

Installation Notes

Installation is typically performed by a machinist or qualified maintenance technician. The parent material bore must be tapped to M8 x 1.25 metric coarse using a standard tap before the insert is driven in. De-energize or lock out any associated equipment before performing thread repair or insert installation in powered machinery. Follow applicable torque and assembly procedures specified in the equipment manufacturer documentation.