Jergens 215-065909 Thread Locking Insert 3/4-10 Unc

Product Description

The JERGENS 215-065909 is a heavy-duty keylocking thread locking insert designed to provide a permanent, load-bearing internal thread in metal assemblies. Manufactured from C1215 carbon steel with a zinc phosphate coating, this insert accepts a 3/4-10 UNC internal thread and installs into a 1-1/8-12 external thread host bore. The overall length is 1.12 inches, making it suitable for applications requiring a compact, high-strength threaded anchor. It meets NAS 1394 standards and carries internal and external thread classes of fit 2B and 2A respectively. Machinists, maintenance technicians, and industrial assembly professionals install this type of insert to restore or reinforce stripped or worn threads in parent materials.

This insert is suited for use in industrial machinery, structural assemblies, and precision mechanical components where thread pullout resistance is critical. The heavy-duty keylocking design mechanically locks the insert into the host material using keys that are driven into the parent material after installation, preventing rotation under load or vibration. It is appropriate for use in ferrous and non-ferrous parent materials where a UNC threaded interface is required and long-term fastener integrity is a priority.

Key Features

• Heavy-duty keylocking design resists rotation and pullout under load and vibration
• C1215 carbon steel construction with zinc phosphate coating for corrosion resistance
• 3/4-10 UNC internal thread with 2B class of fit for standard bolt engagement
• 1-1/8-12 external thread with 2A class of fit for precise host bore installation
• Meets NAS 1394 standard for keylocking threaded inserts
• Compact 1.12-inch overall length suits tight-clearance assemblies

Compatibility

Designed as an OEM-style keylocking insert for industrial assemblies requiring a 3/4-10 UNC internal thread in a 1-1/8-12 tapped host bore per NAS 1394.

Installation Notes

Installation is performed by machinists or maintenance technicians using a proper keylocking insert installation tool to drive the locking keys into the parent material after threading the insert into the prepared bore. The host material must be tapped to a 1-1/8-12 thread prior to installation. De-energize or lock out any machinery before servicing threaded connections in live equipment. Follow NAS 1394 installation procedures and the insert manufacturer guidelines for key-driving depth and torque to avoid damaging the parent material.