These inserts are made to stringent military specifications. Drive the keys into the surrounding material for a more secure hold than thread-locking inserts. Use them to repair or change threads in soft metals such as aluminum. Inserts may be mildly magnetic. They’re comparable to Keensert® inserts. Installation requires a drill bit, a standard tap, an installation tool, and a hammer.

Inserts with a thin wall are often used in small holes or near the edge of a workpiece.

Choose inserts with a thick wall for greater strength than thin-wall inserts, or to fill a large hole.

Inserts with an extra-thick wall are stronger than thick- and thin-wall inserts. Use them to reduce the size of tapped holes.

The strongest and most corrosion-resistant stainless steel key-locking inserts we offer. Made of A286 stainless steel, these inserts stand up to salt water, harsh chemicals, and even high temperatures. Since you drive the keys into the surrounding material, these inserts also give you a more secure hold than thread-locking inserts. Use them to repair or add new, reusable threads to aluminum and other soft metal. They’re comparable to Keensert® inserts. Those that meet stringent military specifications or National Aerospace Standards have high-precision threads and tight tolerances.

Install them using a drill bit, a standard tap, an installation tool, and a hammer.

Inserts with a thin wall are often used in small holes or near the edge of a workpiece.

Choose inserts with a thick wall for large holes. They’re often used when you need to drill out damaged threads.