This product is a nut that can self-lock by friction. Ordinary nuts will loosen by themselves due to vibration and other reasons during use. The main function of the locking nut is to prevent loosening and shock. Its working principle is generally self-locking by friction. The types of locking nuts classified by function include embedded nylon rings, necked ends, and metal anti-loosening devices. High-strength self-locking nuts can convert friction into expansion force between bolts and slot nuts to achieve excellent self-locking effect. Exquisite production technology can keep the torque type of locking elements consistent. The product is generally used in railway casting, rail transportation, transmission systems, mining equipment, highways, military, oil production machinery, automobile industry, public facilities, MRT, engines, construction machinery, aerospace, drilling equipment, bridges, generators, agricultural machinery, shipbuilding industry, metallurgical equipment, trains, compressors, medical machinery, signal systems, wind power generation.