Steel Helicoil thread inserts used in low resistance materials, such as aluminum and magnesium, can prevent damage to the thread and achieve good connection performance, to improve the strength of the connection and enhance the connection condition. M8 X 1.25 Helicoil used for parts that require frequent removal, can greatly improve the service life and wear resistance of the screw thread. Helicoil due to certain elasticity, the thread insert can equalize the load distribution on each thread, eliminate the pitch and tooth deviation between the screw and the screw hole, and absorb vibration, thereby increasing the connection strength of the screw thread and fatigue resistance. Threaded insert that can prevent the screw from loosening, especially used for products that require a high safety coefficient. Easy to maintain, install a thread insert in a damaged screw hole, then the screw hole can be used normally to prevent the loss of workpieces.