Jergens 215-066521 Thread Locking Insert 10-32 Unf Thin Wall

Product Description

The JERGENS 215-066521 is a thin wall keylocking thread locking insert designed to provide a secure, permanent internal thread in parent materials that require strong thread retention. The insert features a 10-32 internal thread and a 5/16-18 external thread in the UNF standard, with an overall length of 0.31 inches. Constructed from 303 stainless steel and passivated per NAS 1394, it delivers corrosion resistance and dimensional stability in demanding service environments. Machinists, maintenance technicians, and assembly professionals install this type of insert where stripped or weak host threads must be repaired or reinforced without adding bulk to the assembly.

This insert is suited for applications in aerospace, defense, and precision mechanical assemblies where thin-wall installation clearances are limited. The keylocking design mechanically locks the insert into the parent material bore, preventing rotation under torque and vibration loading. It is appropriate for use in aluminum, magnesium, titanium, and other materials where direct tapping would produce insufficient thread strength. The compact 0.31-inch length makes it viable in shallow-boss and thin-section workpieces where standard-length inserts would not fit.

Key Features

• 10-32 internal thread with 2B class of fit for standard fastener engagement
• 5/16-18 UNF external thread with 2A class of fit for consistent installation torque
• Thin wall keylocking design allows installation in limited-clearance bores
• 303 stainless steel construction with passivated finish for corrosion resistance
• Meets NAS 1394 standard
• Overall length of 0.31 inches suits shallow-boss and thin-section applications

Compatibility

Designed as an OEM-style replacement or new-installation keylocking thread insert for assemblies requiring a 10-32 internal thread with a 5/16-18 UNF external thread in a thin wall configuration.

Installation Notes

Installation of keylocking thread inserts requires drilling and tapping the parent material to the specified external thread size before driving the insert. A proper keylocking insert installation tool should be used to seat the insert flush and drive the locking keys without damaging the host bore. Always de-energize or disassemble the relevant assembly before performing thread repair or insert installation. Follow NAS 1394 and applicable engineering specifications for installation depth and key-staking procedure.