Screw Office Chair
The commonly used hexagon socket screws for office chairs are mainly M6 and M8, in addition to high-strength fasteners such as M3 and M4. Different models correspond to different load-bearing requirements and installation positions.
M6 and M8 are the most common hexagon socket screw specifications in office chairs. The M6 screw has a diameter of 6mm and is typically used for connecting components with light to medium load-bearing requirements, such as the fixation of the seat and armrests, and the assembly of some adjustment mechanisms. In these scenarios, the strength requirements for the screws are relatively low, and the M6 specification can ensure connection stability while facilitating installation and removal. The M8 screw has a diameter of 8mm and is mainly used for parts that need to bear heavier weights, such as the connection between the chair back and the base, and the fixation of the five-star foot and the gas lift. These positions are subjected to the human body's weight and dynamic pressure for a long time, and the larger diameter and higher strength of the M8 screw can effectively avoid the risks of loosening or breaking.
In addition to the two mainstream models mentioned above, M3 and M4 screws are also commonly found in precision components or auxiliary connections of office chairs. The M3 screw has a diameter of 3mm and is mostly used for fixing small parts such as adjustment knobs and decorative covers; the M4 screw has a diameter of 4mm and may be used for the installation of chair wheels and the connection of some plastic parts. Although these screws are small in size, they can still meet local load-bearing requirements through high-strength materials (such as stainless steel or carbon steel) and precision processing.
The selection of screw models should comprehensively consider load-bearing capacity, installation space, and disassembly frequency. For example, the connection between the chair back and the base should prioritize the use of M8 screws to ensure safety; while the armrest adjustment mechanism, due to limited space and frequent operation, may use M6 or smaller models. In addition, some high-end office chairs adopt specially designed screws (such as models with anti-loosening washers or self-locking functions) to further enhance stability.
In actual use, if you need to replace screws, it is recommended to refer to the original chair's model specifications first and ensure that the material of the new screws (such as stainless steel for rust prevention and carbon steel for high strength) matches the usage environment. Incorrect selection may lead to loose connections, component damage, or even safety hazards.
