Jergens 215-066101 Thread Locking Insert 10-32 Unf

Product Description

The JERGENS 215-066101 is a heavy-duty keylocking thread locking insert designed to create permanent, load-bearing internal threads in softer or damaged parent materials. Featuring a 10-32 UNF internal thread and a 3/8-16 UNF external thread, this insert locks into the host material using a keylocking installation method that resists rotation under vibration and dynamic loads. The insert measures 0.31 inches overall length and is manufactured from C1215 carbon steel with a zinc phosphate coating for corrosion resistance. It meets NAS 1394 standards and carries internal and external thread class-of-fit ratings of 2B and 2A respectively. Machinists, maintenance technicians, and aerospace assembly personnel are the primary installers.

This insert is used in applications where a reliable, high-strength threaded connection is required in aluminum, cast iron, or other materials that cannot reliably hold a thread on their own. Heavy-duty keylocking inserts are common in aerospace, defense, industrial equipment, and MRO repair operations where thread failure is not an option. The compact 0.31-inch length suits installations with tight depth clearances.

Key Features

• 10-32 UNF internal thread with 2B class of fit for precise fastener engagement
• 3/8-16 UNF external thread with 2A class of fit locks securely into the parent material
• Heavy-duty keylocking design resists rotation under vibration and dynamic loading
• C1215 carbon steel construction with zinc phosphate coating for corrosion resistance
• Meets NAS 1394 standard for thread locking inserts
• Compact 0.31-inch overall length suits shallow-depth installation bores

Compatibility

Designed as an OEM-style replacement or new-installation insert for applications requiring a 10-32 UNF internal thread in a 3/8-16 tapped host bore, per NAS 1394 specifications.

Installation Notes

Installation is performed by machinists or maintenance technicians using a keylocking insert installation tool sized for the 3/8-16 external thread. The parent material must be tapped to the correct 3/8-16 thread specification before insert installation. Ensure the host material is secured and the bore is clean and free of debris before driving the insert. Keys are driven flush or below the parent surface after the insert is seated to complete the locking action.