Jergens 215-066501 Thread Locking Insert 10-32 3/8-16 Unf

Product Description

The JERGENS 215-066501 is a heavy-duty keylocking thread locking insert designed to create a permanent, load-bearing threaded connection in parent materials that cannot support a reliable thread on their own. The insert features a 10-32 UNF internal thread and a 3/8-16 UNF external thread, with an overall length of 0.31 inches. Constructed from passivated 303 stainless steel, it resists corrosion and meets NAS 1394 standards. Machinists, toolmakers, and maintenance technicians install these inserts where thread stripping is a concern or where a stronger thread form is needed in softer base materials.

This insert is suited for precision metalworking, aerospace, defense, and industrial maintenance applications where a secure, non-rotating threaded insert is required. The keylocking design uses keys that are driven into the parent material after installation, locking the insert in place under vibration and heavy load. It is appropriate for use in steel, aluminum, and other engineering materials where a standard UNF thread form is specified.

Key Features

• 10-32 UNF internal thread with a 2B class of fit for standard fastener engagement
• 3/8-16 UNF external thread with a 2A class of fit for secure installation in the parent bore
• Overall length of 0.31 inches for compact, low-profile installations
• 303 stainless steel construction with passivated finish for corrosion resistance
• Heavy-duty keylocking design meets NAS 1394 standard
• Passivated surface treatment for enhanced durability in demanding environments

Compatibility

Designed as an OEM-style replacement or new-installation keylocking thread insert for applications requiring a 10-32 internal thread and 3/8-16 external thread in UNF thread form per NAS 1394.

Installation Notes

Installation is typically performed by machinists or maintenance technicians using a prepared parent bore drilled and tapped to the 3/8-16 external thread specification. Power down all relevant machinery before beginning work. Keys must be driven into the parent material after the insert is threaded into place to prevent rotation under load. Follow the fastener manufacturer's installation procedure and applicable industry standards for thread insert installation.