1. The difference between screws, nuts, nuts, bolts, screws, and studs:
The standard statement 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 an inner thread, which is used to cooperate with the bolt and tighten the related parts.
The nut is a common name, and the standard should be called "nut".
The head of the screw is generally hexagonal, and the stem has external threads.
The screw is small, the head has a flat head, a cross head, etc., and the stem has an external thread.
The stud should actually be called a "double-ended stud", with external threads on both ends, and a polished rod in the middle. The long end of the thread is used to connect with the deep hole, and the short end is connected to the nut.
