20Pcs Wire Thread Insert M12 x 1 Threaded Repair Reduce Nut Spiral Circle Extension Tool

1、Fit the socket set in the screw hole of the metal material workpiece to form a high‑accuracy standard female thread. 2、When thread processing error occurs or female thread hole is damaged, the wire thread insert is a good maintenance tool. 3、The thread socket is female thread fastener with certain elasticity, which can enhance the connection strength and fatigue strength of the thread. 4、Stainless steel has good corrosion resistance and is not easy to break when repairing threaded holes. 5、Wire thread insert can be used to convert between metric and imperial threaded holes, which is convenient and fast. 20 x Wire Thread Insert Item Type: Wire Thread InsertMaterial: SUS304Model: M12 x 1Thread Specification: M12 x 1Outside Diameter Before Installation: Approx. 14.3- 14.8mm / 0.56- 0.58inDrill Bit Diameter: Approx. 12.3mm / 0.5in1D Length After Installation: Approx. 12mm / 0.5in 1.5D Length After Installation: Approx. 18mm / 0.7in2D Length After Installation: Approx. 24mm / 0.9in 2.5D Length After Installation: Approx. 30mm / 1.2in3D Length After Installation: Approx. 36mm / 1.4inWire Thread Insert Model For Example: M3 x 0.5 x 1.5D, which means that after the screw set is completed, the female thread is M3, the pitch is 0.5, and the length is 1.5D (length is 1.5 times the diameter, that is, 1.5 x 3= 4.5mm ), the length here refers to the length after installation.Wire thread inserts are also called threaded sheaths, stainless steel threaded sleeves, wire sleeves, and braces. They are a new type of internal threaded fasteners made of high-strength, high-accuracy diamond-shaped cross-section steel wires; Application to low-strength engineering materials such as aluminum alloy, zinc alloy, copper, plastic, etc., can significantly improve thread strength and wear resistance.