Jergens 215-066243 Thread Locking Insert M6x1 3/8-16

Product Description

The JERGENS 215-066243 is a solid keylocking thread locking insert designed to provide a permanent, vibration-resistant threaded hole in a parent material. It features an M6 x 1.00 internal thread and a 3/8-16 external thread, allowing technicians to install a metric-threaded fastener into a UNC-tapped hole. The insert measures 0.31 inches in overall length and is manufactured from C1215 carbon steel with a zinc phosphate coating for corrosion resistance. The solid keylocking design mechanically locks the insert into the parent material, preventing rotation under load. Machinists, tool and die makers, and maintenance technicians install these inserts to repair stripped threads or adapt between thread standards.

This insert is suited for applications requiring a durable, thread-converting or thread-repair solution in metal parent materials. Common use cases include converting existing UNC-tapped holes to accept M6 x 1.00 metric fasteners in industrial fixtures, tooling plates, machine housings, and MRO repair situations. The zinc phosphate finish provides a base layer of protection against moisture and mild corrosion in typical shop and manufacturing environments. The insert conforms to NAS 1394 standards, making it appropriate for precision mechanical assemblies where thread integrity is critical.

Key Features

• M6 x 1.00 internal thread with 6H class of fit for precise metric fastener engagement
• 3/8-16 external thread with 2A class of fit for installation into UNC-tapped parent holes
• Solid keylocking design mechanically locks the insert to resist rotation and pull-out
• C1215 carbon steel construction with zinc phosphate coating for durability and corrosion resistance
• Compact 0.31-inch overall length suits thin-section parent materials
• Conforms to NAS 1394 standards for use in precision and industrial assemblies

Compatibility

Designed as a solid keylocking thread locking insert compatible with parent materials tapped to 3/8-16 UNC, accepting M6 x 1.00 metric fasteners. Thread standards supported include Metric Coarse, UNC, and UNF per NAS 1394.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a dedicated keylocking insert installation tool to drive the locking keys into the parent material after the insert is threaded into place. The parent material hole must be tapped to the correct 3/8-16 UNC specification and depth before installation. Ensure the parent material and insert threads are clean and free of debris prior to assembly. Follow NAS 1394 installation procedures and the insert manufacturer guidelines for key staking to achieve proper retention.