Release time：2020-01-16 18:44 Browse：
In the in-depth discussion of the hexagon three-combination long screw and its matching gasket grade problem, we first need to clarify several key concepts: the structural characteristics of the hexagon three-combination screw, the meaning of 8.8 strength, and the important role of the gasket in the mechanical connection and grade division.
Structure and characteristics of hexagonal three-combination long screws
Hexagon three combination screw, as a special fastener, its design is exquisite, complex structure. The screw is mainly composed of three parts: screw body, flat gasket and spring gasket. The screw body adopts hexagonal design, which is easy to use special tools to tighten and effectively prevent the damage of the screw head. The combination of flat gasket and spring gasket greatly enhances the stability and sealing of the connection.
The three-combination design brings several significant advantages: first, better durability. Due to the presence of the internal washer, it can effectively reduce the screw loosening caused by vibration or stress changes, and extend the service life. Second, better torque transfer. The special internal structure allows torque to be transmitted more evenly to the connected parts, improving the firmness of the connection. Finally, higher security. In high-strength mechanical connections, this design can effectively avoid safety accidents caused by screw loosening.
Meaning of Class 8.8 strength
In the field of fasteners, 8.8 is an important strength grade identifier. It indicates that the fastener has reached a minimum value of 800MPa in tensile strength, while its yield strength is not less than 640MPa. This grade of fasteners is widely used in mechanical connections with high requirements for strength and stability, such as automobiles, aviation, ships and heavy machinery.
Grade and function of gaskets
As a key component in the mechanical connection, the main role of the gasket is to fill and isolate the gap between different media to achieve the effect of sealing and anti-loosening. The sealing grade and material of the gasket directly determine its use environment and performance. In industry, gaskets can be divided into soft gaskets, medium and hard gaskets and metal gaskets according to different materials and uses. Among them, metal gaskets are often used in demanding mechanical connections because of their excellent high temperature, high pressure and corrosion resistance.
However, regarding the question "Is the gasket also 8.8 grade?" On this issue, there are actually some misunderstandings. The grade of the gasket does not directly correspond to the strength grade of the fastener (such as the screw). The grade of the gasket refers more to its material, sealing performance and adaptability to the use environment. When selecting gaskets, it is necessary to consider the specific connection requirements, the nature of the medium and the working environment.
For the gasket of the hexagon three-combination long screw, if its material is metal and needs to meet the requirements of high strength and high sealing, it may be made of materials similar to the screw body or with higher performance. However, it should be noted that this does not mean that the "grade" of the gasket is 8.8. On the contrary, we should pay attention to the material, sealing performance, compressive strength and other specific indicators of the gasket to ensure that it can meet the connection needs.
conclusion
To sum up, the grade problem of the hexagon three-combination long screws and their supporting gaskets is not a simple one-to-one correspondence. In the selection and use, it is necessary to comprehensively consider the specific connection requirements, working environment and material properties. For gaskets, it is more important to pay attention to the adaptability of its material, sealing performance and use environment to ensure the stability and safety of the connection. At the same time, it is also necessary to follow the relevant national standards and industry specifications to ensure the quality and reliability of the connection.
#GB70.1 hex extension screw #DIN912 hex extension screw # High strength hex extension screw #200mm hex socket screw
