E-z Lok 319-M5 Thread Locking Insert M5 X 0.8 5/16-18

Product Description

The E-Z LOK 319-M5 is a self-locking wall thread insert engineered to create a secure, permanent internal thread in metal parent materials. It features an M5 x 0.80 internal thread and a 5/16-18 external thread, with an overall length of 0.312 inches. Manufactured from C12L14 carbon steel with a smooth rolled finish, this insert delivers reliable thread retention in high-vibration or load-bearing applications. It is installed using a standard tap and is suited for production and maintenance environments where thread strength in thin-wall or soft-metal assemblies is required.

This insert is intended for use in metal fabrication, equipment assembly, and maintenance repair applications where a metric internal thread must be anchored into a standard fractional-thread host material. The self-lock wall design resists rotation and pullout without adhesives. Installers working in HVAC equipment assembly, electrical enclosure manufacturing, or general mechanical maintenance will find this insert useful for converting or reinforcing threaded holes in steel, aluminum, and similar substrates.

Key Features

• M5 x 0.80 internal thread with 2B class of fit for standard metric fastener compatibility
• 5/16-18 external thread with 2A class of fit for precise engagement in host material
• Self-lock wall design resists rotation and pullout without adhesives or staking
• C12L14 carbon steel construction for durability in load-bearing thread applications
• Overall length of 0.312 inches suitable for thin-wall and shallow-hole installations
• Smooth rolled finish compatible with standard tap installation - no special tooling required

Compatibility

Designed for installation in parent materials tapped with a standard 5/16-18 tap, accepting M5 x 0.80 metric fasteners with a 2B internal thread class of fit.

Installation Notes

Installation is performed by tapping the host material to a 5/16-18 thread profile using a standard tap before driving the insert. Ensure the parent material is securely fixtured and that chips are cleared from the tapped hole before installation. Thread locking inserts should be driven flush or to the specified depth using the appropriate installation tool - do not cross-thread or force the insert by hand. Follow applicable mechanical assembly standards for torque and fastener engagement depth based on the host material type.