What percentage of fasteners in machinery

60%. In modern machinery, nuts, bolts as life and industry commonly used fasteners, the number of fasteners accounted for 60% of the total number of machine parts, of which the threaded connection is one of the most common forms of mechanical connection. Fasteners, is for fastening connections and the application of a very wide range of mechanical parts, the use of a wide range of industries, including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, molds, hydraulics and so on, in a variety of machinery, equipment, vehicles, ships, railroads, bridges, buildings, structures, tools, instruments, chemicals, meters and supplies, etc., can be seen on the top of all kinds of fasteners, the most widely used It is the most widely used mechanical foundation parts. It is characterized by a wide variety of specifications, performance and use of different, and standardization, serialization, generalization of the degree is also very high. Therefore, some people have national standards for a class of fasteners called standard fasteners, or simply standard parts.