(25Pcs M8x1 Universal Stainless Steel Helicoil Thread Insert Repair Set. Thread Size: M8x1. Item included: 25 x Helicoil Thread Inserts. 3) Due to the certain elasticity of the wire threaded sleeve, the load distribution on each circle of the thread can be more uniform, the pitch and tooth shape deviation between the screw and the screw hole can be eliminated, and vibration can be absorbed, thus improving the connection strength and resistance of the thread.
eBay