What Is The Difference Between Screws, Bolts And Screws?

In life, bolts, screws, screws, etc. are often mentioned. What is the difference between them? In fact, the standard is that there are no screws and nuts. Screws are commonly known as "screws" with external threads. The shape of the nut is usually hexagonal, and the inner hole is internally threaded to match the bolt and tighten the relevant parts. The nut is a common name and the standard should be called "nut". The head of the bolt is generally hexagonal and the stem has external threads. The screw is small, the head has a flat head, a crosshead, etc., and the stem has external threads. The studs should actually be called "double studs", with external threads on both ends, and the middle is usually a polished rod. The long end of the thread is used to connect to the deep hole and the short one is connected to the nut.