Material: Stainless Steel The locking type wire screw sleeve can lock the screw into the threaded hole, so that the screw is not loose when subjected to shock vibration. Because of a certain elastic, can make the load on the thread is more even, eliminate the screw and screw hole deviation between the pitch and tooth type, and can absorb vibration, thus increasing the screw thread connection strength and resistance to fatigue strength. Used in various low strength materials, which can improve the wear resistance of bolt connections and avoid the damage of thread. Package included: 10pcs x M3x0.5x2D Thread Repair Insert, 10pcs x M4x0.7x2D Thread Repair Insert, 10pcs x M5x0.8x2D Thread Repair Insert, 10pcs x M6x1.0x2D Thread Repair Insert, 10pcs x M8x1.25x2D Thread Repair Insert, 5pcs x M10x1.5x2D Thread Repair Insert, 5pcs x M12x1.75x2D Thread Repair Insert, Product Description Premium Material The thread repair insert is made of stainless steel 304 material, which improves the wear resistance of bolt connections and avoids damage. Thread repair In the case of threading errors or repairing damaged female threaded holes, the threaded screw can be used as a repairing means to recover the screw holes cost-effectively. The same screws can be used after recovery. Wide application The size of the wire thread insert is the standard size, often used in hydraulic machinery, welding equipment, auto parts, power machinery and furniture. Excellent Performance The helical insert can strengthen the connection strength, improve the connection conditions, avoid slippage and wrong teeth, and obtain excellent connection performance.