When it comes to fasteners, everyone seems to know a little bit about it. After all, hardware such as screws and nuts are commonplace in life. Fasteners are widely used in many industries and the degree of standardization, serialization and generalization is extremely high.

Although the figure of the fastener is inconspicuous, it is a rare but important existence in daily life. Fasteners are used in aircraft carriers, airplanes, high-rise buildings, as small as watches, mobile phones, glasses, etc.