E-z Lok 650-12 Thread Locking Insert M12 X 1.75 3/4-10

Product Description

The E-Z LOK 650-12 is a standard wall thread locking insert designed to create a strong internal thread in a tapped hole with an external thread for installation. The insert accepts an M12 x 1.75 internal thread and uses a 3/4-10 external thread to lock into the parent material. Manufactured from C12L14 carbon steel with a smooth, rolled finish, this insert measures 0.656 inches in overall length. It is installed by licensed trade professionals and maintenance technicians working with metric fastening applications in ferrous and non-ferrous base materials.

This insert is suited for applications requiring a metric coarse or metric fine internal thread where the base material thread condition is compromised, undersized, or requires reinforcement. The 3/4-10 external thread engages a standard-tapped hole, while the M12 x 1.75 internal thread accepts the mating fastener. Typical install scenarios include industrial equipment repair, HVAC equipment frames, pump housings, and machinery where metric fastener engagement must be restored or reinforced.

Key Features

• M12 x 1.75 internal thread with a 2B class of fit for standard metric coarse and metric fine applications
• 3/4-10 external thread with a 2A class of fit locks into a standard-tapped parent hole
• Standard wall design accommodates typical wall thickness requirements without oversized tapping
• C12L14 carbon steel construction provides reliable thread strength in ferrous base materials
• Smooth, rolled finish on the external thread aids installation and thread engagement
• Overall length of 0.656 inches suits compact fastener joint applications

Compatibility

Designed as an OEM-style thread repair and locking insert for applications requiring an M12 x 1.75 internal thread installed via a standard 3/4-10 tapped hole in carbon steel or compatible base materials.

Installation Notes

Installation is typically performed by a machinist, maintenance technician, or journeyman tradesperson using a standard tap sized for 3/4-10 threads and the appropriate E-Z LOK installation tool. The workpiece should be fully de-energized or depressurized before insert installation when working on energized or pressurized equipment. Do not exceed the recommended torque range for the parent material, and do not install in materials with insufficient wall thickness to support the external thread engagement. Follow applicable fastener and equipment service codes for the specific application.