The Screw of the Office Chair Falls Off

If the screw of the office chair falls off and it is a 10x80 M6 semi-round head galvanized internal hexagon bolt, you can look for a screw of the same model for replacement. If the screw hole or the connecting part is damaged, it needs to be repaired or professional personnel should be contacted for handling according to the specific situation.

Screw Model Matching and Replacement

If the model of the fallen screw is clearly identified as a 10x80 M6 semi-round head galvanized internal hexagon bolt, it is necessary to prioritize finding a screw that matches exactly for replacement. The specification parameters of such screws (such as a diameter of 6mm, a length of 80mm, a semi-round head design, galvanized anti-rust treatment, and an internal hexagon drive method) need to be strictly corresponding. Otherwise, installation instability or damage to the chair body may occur due to size or structural differences. When replacing, use an internal hexagon wrench of the corresponding specification to ensure that the screw is fully screwed in and not loose.

Common Causes of Screw Loosening and Falling Off

The loosening and even falling off of screws on office chairs are common phenomena, mainly caused by the following reasons:

• Vibration and Impact: During daily use, the movement of the chair, adjustments in sitting posture, or body weight pressure may cause the screws to loosen.
• Improper Installation: If the screws are not tightened properly, no washers are used, or the threads are not aligned during installation, it may lead to later falling off.
• Material Embedding Issues: If the material of the chair body (such as plastic or wood) is incompatible with the metal material of the screws, it may cause the screws to loosen due to thermal expansion and contraction or stress concentration.
• Thread Quality Issues: Insufficient thread processing accuracy of the screws or screw holes (such as pitch deviation or incomplete tooth profiles) will reduce the connection strength.

Repair of Damaged Screw Holes or Connecting Parts

• Damage to the Threads of the Screw Hole: If the threads of the screw hole are worn due to repeated disassembly and assembly or external impact, a wire thread insert can be installed for repair. A wire thread insert is a high-strength, corrosion-resistant thread insert that can restore the thread accuracy of the screw hole and enhance connection reliability.
• Breakage of the Screw at the Connecting Part: If the breakage occurs at a key connecting part (such as the connection between the armrest and the backrest), it may be caused by the complex structure of the chair body or insufficient material strength. In this case, it is recommended to contact a furniture repair shop or return it to the factory for handling to avoid secondary damage or safety hazards caused by self-repair.