A high-strength nut is a nut made of high-strength steel, or a nut that requires a large force to be locked, which can be called a high-strength nut. Many high-strength nuts are used in the connection between bridges and rails or some high-voltage and high-pressure equipment. The fracture mode of high-strength nuts is generally brittle fracture. Generally, in order to ensure the sealing of the container, we require a large prestress when installing high-voltage equipment. A high-strength nut, also known as a heavy-duty nut, is a fastener made of a high-strength material. It has excellent load-bearing capacity and anti-loosening properties, and is widely used in various occasions that need to withstand high loads and vibrations.