Lock nut is a nut that realizes self-locking function through special design. Its working principle is to use the friction between the nut and the bolt to self-lock, and it is widely used in machinery and other industries. Locking nuts can be divided into many types, such as double nuts, special anti-loosening nuts, nuts with through threaded holes, etc. The specifications of locking nuts range from M6 to M64, and the materials are divided into carbon steel, stainless steel, high-strength steel, etc. Locking nuts of different specifications have different torque and load-bearing capacity.