Breakaway nut is to cut a certain depth of annular groove on the nut, and the wrench is placed on the upper part of the annular groove, and the nut is twisted off at the annular groove to control the predetermined force. Its advantage is that it can accurately control the preload force and improve the stability and reliability of the connection. The most common materials are stainless steel (SS304, SS316), carbon steel, and aluminum alloy. The surface treatment generally includes natural color treatment and hot-dip galvanizing. Breakaway nuts are mostly used in automobile manufacturing, railway engineering, power equipment, building stairs and other fields. Haina has a variety of types, complete specifications, excellent materials, strict standards and fine surface treatment, which can meet the needs of different application scenarios.