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Thread Insert – Permanent Thread Repair and Reinforcement
About the Product
Thread inserts, commonly recognized as helical screw thread inserts (like the Helicoil type), are precision-formed screw thread coils that are installed into a tapped hole to create a robust, permanent internal thread. They are primarily used to repair damaged or stripped threads and to reinforce threads in soft materials such as aluminum, magnesium, and plastics, where the base material may lack sufficient strength.
- Creates strong, wear-resistant, and corrosion-proof threads.
- Repairs damaged or stripped threads back to original size.
- Distributes static and dynamic load evenly across all engaged threads.
- Reduces stress concentration in the parent material thread root.
Thread inserts are an essential component for Maintenance, Repair, and Overhaul (MRO) tasks, providing an economical way to save expensive components with compromised threads. They are widely specified in automotive, aerospace, and general machinery manufacturing for high-reliability joints.
Technical Specifications
Characteristics: Precision-formed helical coil, typically made from high tensile stainless steel wire.
Measurements: Available in all standard and fine pitch threads (Metric and Imperial). Sizes range from M2 to M48.
Configurations: Free-running type (standard) and Screw-locking type (with one or more coils polygonized to create friction).
Tensile Strength: High strength, with material rating up to 1400 N/mm² depending on the alloy.
Service Life: Permanent installation. Typically surpasses the service life and strength of the original tapped thread.
Tolerances: Manufactured to tight specifications, often meeting Aerospace and Military standards (e.g., DIN 8140).
Applications: Engine blocks, transmission cases, molding dies, heavy machinery, hydraulic equipment, and any high-stress threaded assembly.
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