E-z Lok 653-12 Thread Locking Insert M12 X 1.75 Stainless

Product Description

The E-Z LOK 653-12 is a standard wall thread locking insert designed to install a strong, wear-resistant threaded connection in materials that cannot reliably hold a thread on their own. The insert features an M12 x 1.75 internal thread and a 3/4-10 external thread, allowing it to be driven into a tapped host material while presenting a metric internal thread for fastener engagement. Constructed from grade 303 stainless steel with a bright finish, it measures 21/32 inches in overall length and weighs approximately 0.04 pounds. Licensed tradespeople and maintenance technicians working with metric fastener applications use this insert when thread repair or thread conversion is required.

This insert is suited for applications where a metric coarse or metric fine internal thread must be anchored in a component tapped with a standard 3/4-10 thread. Typical use cases include industrial equipment repair, structural assemblies, and precision thread restoration in metal or high-density substrates. The standard wall design is appropriate for applications with adequate host material wall thickness to accommodate the external thread engagement. Installation requires a standard tap sized for the 3/4-10 external thread profile.

Key Features

• M12 x 1.75 internal thread with 2B class of fit for reliable metric fastener engagement
• 3/4-10 external thread with 2A class of fit for secure installation in host material
• Grade 303 stainless steel construction resists corrosion and wear
• Bright finish on all surfaces
• Standard wall design suits applications with sufficient surrounding material thickness
• Compatible with both metric coarse and metric fine thread standards

Compatibility

Designed as an OEM-style thread locking insert for applications requiring an M12 x 1.75 internal thread installed via a 3/4-10 externally threaded insert in standard wall configurations.

Installation Notes

Installation is typically performed by a machinist or maintenance technician using a standard tap sized for the 3/4-10 external thread. The host material must be tapped to the correct depth before driving the insert to avoid cross-threading or damage to the internal thread. De-energize or lock out any equipment before performing thread repair work on components in service. Follow applicable facility maintenance and safety procedures when working with threaded fastener systems.