Features Due to a certain elasticity, the threaded insert can balance the load distribution on each thread, eliminate pitch and tooth deviations between screw and screw hole, and absorb vibration, increasing the strength and fatigue resistance of the screw thread connection. Steel threaded inserts used in low strength materials such as aluminum, magnesium can avoid thread damage and achieve good connection performance to improve connection strength and connection condition. Used for parts that need to be removed frequently, it can significantly improve the service life and wear resistance of the screw thread. Easy to maintain, install a threaded insert into a damaged screw hole, then the screw hole can be used as usual to avoid workpiece loss. It can prevent the screw from loosening, especially for products that require a high insurance coefficient. Description: Steel thread inserts can effectively improve the screw connection and significantly improve reliability. Used in all types of materials with low strength, threaded inserts can largely improve the wear resistance of the screw connection and avoid thread damage. Specifications: Material: stainless steel. Size: M 4 (inner diameter) x 2D (installed length = 2 x 4 mm = 8 mm). Quantity: 50 pieces. Weight: 89g (approx.) Package includes: 50 x thread inserts. 1 x installation tool (M 4). 1 x dedicated tap (ST4). 1 x tenon breaker. 1 x drill bit. Package List