Jergens 215-065923 Keylocking Thread Insert 5/16-18

Product Description

The JERGENS 215-065923 is a thin wall keylocking thread locking insert designed to install a permanent, vibration-resistant internal thread into a host material. The insert accepts a 5/16-18 internal thread and is driven into a 7/16-14 external thread preparation, both in UNC form. At 0.43 inches overall length, the insert is suited for applications where wall thickness is limited. It is manufactured from C1215 carbon steel with a zinc phosphate coating for corrosion resistance. Machinists, maintenance technicians, and assembly professionals install these inserts to create reliable threaded connections in metallic components.

This insert is used in industrial and manufacturing environments where a secure, permanent threaded hole is required in a parent material. The thin wall design allows installation in tighter material cross-sections compared to standard keylocking inserts. Typical applications include machinery frames, fixtures, tooling plates, and structural assemblies where thread pull-out resistance and vibration resistance are critical. The keylocking design uses keys that are driven into the host material to lock the insert against rotation and axial movement.

Key Features

• Thin wall keylocking design for use in limited-wall-thickness applications
• 5/16-18 internal thread with Class 2B fit for standard UNC fastener engagement
• 7/16-14 external thread with Class 2A fit for installation into prepared host bore
• C1215 carbon steel construction for strength and machinability
• Zinc phosphate coating provides corrosion resistance
• Meets NAS 1394 standard for keylocking insert performance

Compatibility

Designed as an OEM-style replacement or new-installation keylocking thread insert for metallic host materials requiring a 7/16-14 external thread preparation and a 5/16-18 internal thread output per UNC standards and NAS 1394.

Installation Notes

Installation is performed by machinists or maintenance technicians using a keylocking insert installation tool to drive the locking keys into the host material after threading the insert into the prepared bore. The host material bore must be properly sized and tapped to the 7/16-14 external thread specification before insert installation. Ensure the host assembly is secured and de-energized or depressurized as appropriate before modifying threaded connections. Do not reuse an insert once the locking keys have been driven, as the locking engagement cannot be reset.