E-z Lok 550-008 Thread Locking Insert 8-32 Internal M8 X 1.25

Product Description

The E-Z LOK 550-008 is a standard wall thread locking insert designed to provide a secure, permanent internal thread in materials that require a stronger or differently sized thread engagement. The insert features an 8-32 internal thread (UNC/UNF, Class 2B fit) and an M8 x 1.25 external thread (Class 2A fit) for installation into a standard-tapped M8 receiving hole. Overall length is 0.2953 inches (7.50 mm). Machined from C12L14 carbon steel with a smooth, rolled finish, this insert delivers reliable thread integrity in metal assemblies across industrial and mechanical trade applications.

This insert is suited for use in metalworking, mechanical assembly, and maintenance applications where a parent material tapped to M8 x 1.25 must accept an 8-32 fastener. It is installed using a standard tap for the external thread and is appropriate for precision assemblies requiring controlled thread fit. Tradespeople and machinists working in manufacturing, equipment repair, and custom fabrication will find this insert useful for thread conversion and thread repair scenarios.

Key Features

• 8-32 internal thread with Class 2B fit for standard fastener engagement
• M8 x 1.25 external thread with Class 2A fit for installation into standard M8-tapped holes
• Overall length of 0.2953 inches (7.50 mm) for compact, space-efficient installation
• C12L14 carbon steel construction for durability in metallic base materials
• Smooth, rolled finish on external thread for consistent installation torque
• Compatible with standard tap type - no special tooling required

Compatibility

Designed for installation into parent materials tapped to M8 x 1.25 using a standard tap, accepting 8-32 internal fasteners per UNC/UNF thread standards.

Installation Notes

Installation is typically performed by a machinist or maintenance technician using a standard M8 x 1.25 tap and an appropriate thread insert driver. Ensure the parent material hole is tapped to the correct depth and tolerance before driving the insert. Power down or de-energize any equipment before performing thread repair or insert installation on assembled machinery. Follow applicable torque specifications for the fastener used in the installed 8-32 internal thread based on the application requirements.