Office Chair Screws
There are various types of screws commonly used in office chairs, including 12.9-grade black hexagon socket set screws, M8*20 black zinc 8.8-grade anti-slip internal and external hexagon screws, and furniture screws with semi-round heads, internal hexagon sockets, washers, and embossed patterns. Different types are suitable for connecting and fixing different components.
The 12.9-grade black hexagon socket set screw is a relatively common type in office chairs, with common specifications such as M3 and M4. This screw has a strength grade of 12.9, making it a high-strength screw capable of withstanding significant tensile and shear forces. It is suitable for components requiring high-strength connections, such as the connection between the chair legs and the seat. Its black appearance is usually achieved through surface treatment, which not only enhances aesthetics but also provides a certain degree of rust resistance. The internal hexagon design allows for easy installation and removal using an Allen wrench, ensuring convenient operation and preventing slippage. The characteristic of set screws is that they have no head, and after installation, they are flush with the component surface, not affecting the overall aesthetics of the office chair.
The M8*20 black zinc 8.8-grade anti-slip internal and external hexagon screw is also one of the commonly used screws in office chairs. The 8.8-grade strength is sufficient to meet the connection requirements of general office chairs, and the black zinc surface treatment provides good rust resistance. The unique feature of this screw is the presence of anti-slip teeth, which increase the friction between the screw and the component during installation, preventing the screw from loosening during use and enhancing the stability and safety of the office chair. The internal and external hexagon design offers flexibility in choosing installation tools, allowing the use of either an Allen wrench or an external hexagon wrench.
Furniture screws with semi-round heads, internal hexagon sockets, washers, and embossed patterns are also widely used in office chairs, with common specifications such as M6 and M8. The semi-round head design ensures a tight fit between the screw head and the component surface, reducing gaps and improving overall aesthetics. The internal hexagon design facilitates installation and removal, while the washer design helps disperse pressure, preventing damage to the component surface by the screw head. The embossed pattern increases the roughness of the screw surface, enhancing friction and helping to prevent the screw from loosening. This type of screw is typically used for connecting components such as the backrest and armrests of office chairs.
