Threaded insert is a new type of neiluo fasteners, it is a high strength, high precision, smooth surface of cold-rolled stainless steel wire stainless steel wire. Mainly used to enhance and protect internal threads of low strength material. Wire thread insert embedded in aluminum, magnesium alloy, cast iron, glass fiber reinforced plastic, plastic and other low strength engineering materials can form high-precision internal thread, with high connection strength, seismic resistance, impact resistance and wear resistance, and can spread stress protection matrix thread, greatly prolong the service life of the substrate.