Office Chair and Boss Chair Screws
There are various types of screws commonly used in office chairs and boss chairs, including M8 galvanized four-claw screws, internal and external hexagon screws, and five-star rubber-headed screws, among others. Different types of screws vary in structure, purpose, and performance.
The M8 galvanized four-claw screw with a four-corner nut is a non-standard customized accessory, often used for embedding in furniture structures such as band chairs, sofas, and swivel chairs. Its 'four-claw' design enhances the grip with the material through four claw-like structures, preventing loosening, and is particularly suitable for fixing soft materials such as wood and plastic. Galvanization improves the screw's corrosion resistance, extending its service life, and making it suitable for humid or easily oxidized environments.
Internal and external hexagon screws, represented by the M8*20 black zinc 8.8-grade model with anti-slip teeth, are common fasteners in office chairs. The internal hexagon structure requires a special wrench for operation, suitable for installation scenarios with limited space; the external hexagon facilitates disassembly with general tools. The 8.8-grade indicates a tensile strength of over 800MPa, meeting high-load requirements; the anti-slip teeth design prevents screw loosening by increasing friction, ensuring the stability of the chair structure. The black zinc coating combines anti-rust and aesthetic functions, suitable for connecting metal frames.
Five-star rubber-headed screws (such as M8 plum-shaped rubber-coated bolts) are mostly used in the adjustment components of office chairs, such as lifting mechanisms or foot fixes. Their pentagonal handle design facilitates manual rotation, allowing height or angle adjustments without tools; the rubber coating increases grip comfort while preventing scratches from direct metal contact. These screws typically use high-strength materials to ensure durability under frequent adjustments.
When selecting screws, it is essential to consider material, specifications, and environmental adaptability comprehensively: Metal frames should prioritize internal and external hexagon screws or high-strength four-claw screws; plastic or wooden components are suitable for four-claw screws; and parts requiring frequent adjustments should use five-star rubber-headed screws. Additionally, the screw's coating (such as galvanized or black zinc) directly affects its anti-rust performance, and a more corrosion-resistant coating should be chosen for humid environments. Properly matching screw types with usage scenarios can significantly enhance the stability and service life of office chairs.
