Screws and nuts are commonly used as connectors in machinery，It is very useful and important。The following are the main uses of screws and nuts：

one、Basic use

1. Connect and fix：Screws and nuts bite each other through threads，Realize the connection and fixing of two or more parts。This connection is simple and reliable，Ensures stability and durability between the connected parts。

2. Transfer power：In mechanical equipment，Screws and nuts are not only used to connect parts，It also plays the role of transmitting power。By tightening the nut，Can ensure a tight fit between parts，To effectively transfer power。

two、Application field

1. Mechanical equipment：In all kinds of mechanical equipment，Screws and nuts are indispensable components。They are used to connect various parts，E.g. bearing、Gear wheel、Drive shaft, etc，Ensure the normal operation of mechanical equipment。

2. Furniture manufacturing：In the furniture manufacturing process，Screws and nuts also play an important role。They are used to connect various parts of furniture，Leg of a table、backrest，Make the furniture structure strong and easy to assemble。

3. Automobile industry：In the automobile industry，Screws and nuts are more widely used。They are used to connect the various parts of the car，engine-like、Base plate、bodywork，Ensure the safety and reliability of the vehicle。

4. Construction industry：In the construction industry，Screws and nuts are also used extensively。They are used to join steel structures、Install doors, Windows, etc.，Ensure the stability and safety of the building。

5. Electronic equipment：In the manufacture of electronic devices，Screws and nuts also play an important role。They are used to connect circuit boards、Housing and other parts，Ensure the normal operation of electronic equipment。

three、Special purpose

1. High strength nut：For the need to withstand large loads and vibration occasions，Such as large machinery and equipment、bridge，High strength nuts can be used。This nut has higher load capacity and fatigue resistance，It can ensure the stability and safety of the connector。

2. Set nut：The setting nut is usually equipped with a groove or spring，Can increase the fastening force and prevent loosening。They are widely used in automotive engine components、Precision instruments and other applications require high accuracy and stability。

3. Special shape nut：Depending on the connection requirements and usage environment，Nuts can also be designed in a variety of special shapes，Hexagon nut、Conical nut、Square nuts, etc。These special shaped nuts can better adapt to different connection methods and working environments。

To sum up，Screws and nuts are widely used and important。They are not only used to connect and secure parts，Its also about delivering power、Ensure the normal operation of mechanical equipment and other important roles。In every field，Screws and nuts all play an indispensable role。