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Glossary
Helicoil® insert
A Helicoil® insert is a type of wire thread insert used to create strong, durable threads inside softer or damaged materials. It’s essentially a tightly wound stainless-steel wire coil, shaped into a helical spring, that’s screwed into a tapped hole to provide internal threads.
Instead of cutting threads directly into aluminum, magnesium, plastic, or other weaker materials—where bolts could strip out—a Helicoil® insert reinforces the hole with hardened steel threads. It not only repairs stripped threads but also increases load-carrying capacity and wear resistance. The insert’s diamond-shaped cross-section allows standard bolts or screws to fit perfectly once installed.
Common in aerospace, automotive, electronics, and machinery industries—anywhere lightweight materials need strong, reliable fastener joints. They’re also widely used in repair and maintenance, restoring stripped or worn threads to “better-than-new” strength.
