The purpose of the nut

Often mentionedbolt, Screws, screws, etc. What is the difference between them? In fact, the standard statement is that there are no screws and nuts. Screws are commonly known, and those with external threads can be called&"screw GG". The shape of the nut is usually hexagonal, and the inner hole is an internal 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 GG". The head of the bolt is generally hexagonal, and the shank has an external thread. The screw is small, the head has a flat head, a cross head, etc., and the rod has an external thread. The actual stud should be called "double-ended stud", both ends have external threads, and the middle is generally a polished rod. The long end of the thread is used to connect to the deep hole, and the short end is connected to theNutconnection.

1. General purpose nuts: There are many varieties, including hexagonal nuts and square nuts. Hex nuts are most commonly used with hexagon bolts, and are classified into A, B, C grades according to manufacturing accuracy and product quality. Hexagon thin nuts are used as auxiliary nuts in the anti-loosening device, which can be used for locking, or where the threaded connection pair is mainly subjected to shearing force. Hexagon thick nuts are mostly used in connections that are often disassembled. The square nut is matched with the square head bolt, the wrench is stuck and not easy to slip, and it is mostly used for rough and simple structures. See GB41, GB6170～6177, etc.;

2. Slotted nut: mainly refers to the hexagonal slotted nut, that is, the slot is machined above the hexagonal nut. It is used in conjunction with screw bolts with holes and split pins to prevent relative rotation of bolts and nuts, see GB6178～6181, etc.;

3. Lock nut: refers to the nut with locking function, such as nylon insert hexagonal lock nut and all-metal hexagonal lock nut. The hexagonal nylon ring lock nut has a very reliable anti-loosening ability. Under the operating temperature -60～+100℃ and certain medium conditions, it has the advantages of not damaging the bolts and connected parts and being able to be frequently installed and unloaded. See GB889, GB6182～6187, etc.;

4. Special purpose nuts: such as wing nuts, cap nuts, knurled nuts and embedded nuts. Wing nuts can generally be disassembled and assembled without tools, and are usually used in places that need to be disassembled frequently and are not stressed; cap nuts are used in places where end screws need to be covered. See GB62, GB63, GB802, GB923, GB806, GB807, GB809, etc.