XunLiu Key Locking Inserts Thread Repair (Int.M12X1.25 Ext.M16X1.5Lg16)

The XunLiu Key Locking Insert is a precision-engineered threaded fastener featuring both internal and external threads, with four locking keys on the outer surface. It is designed to provide a permanent, torque-resistant, and vibration-proof thread connection in demanding industrial applications. How It Works: Once the parent material is tapped to the required size, the insert is threaded into the hole, and the four locking keys are driven into the base material using a key-driving tool. This creates a solid mechanical lock that prevents the insert from rotating or being pulled out under load. Ideal Applications: Thread repair in aluminum, cast iron, plastics, and other low-strength materials; aerospace, automotive, electronics, and precision machinery manufacturing; repair and maintenance scenarios requiring thread restoration without full part replacement. The insert is fully removable without damaging the parent material, offering unmatched flexibility for engineering and repair teams.

• PROFESSIONAL THREAD REPAIR — Designed to restore damaged or stripped internal threads to full original strength. Eliminates costly part replacement and rework, saving time and material costs in industrial and manufacturing environments.
• 4-KEY LOCKING MECHANISM FOR VIBRATION RESISTANCE — Four external locking keys are permanently pressed into the parent material, providing a 360° mechanical lock that prevents rotation, loosening, or pull-out even under high torque and heavy vibration loads.
• PREMIUM 303 STAINLESS STEEL CONSTRUCTION — Manufactured from corrosion-resistant 303 stainless steel, offering excellent performance in harsh environments including moisture, chemicals, and elevated temperatures. Built for long-lasting reliability.
• REINFORCES LOW-STRENGTH BASE MATERIALS — Ideal for aluminum alloy, cast iron, engineering plastics, and other soft or brittle materials. Dramatically increases the load-bearing capacity of threaded holes, extending service life of assemblies.
• REMOVABLE WITHOUT DAMAGING PARENT MATERIAL — The key insert can be removed and replaced without compromising the base material, making it perfect for repair, maintenance, and prototype applications where flexibility is essential.