Tamper-proof screw

basic information

■ A groove is set between the head of the screw and the threaded part. Due to the action of this groove, it is designed to break at the targeted torque. ■ This is a product designed based on the target torque for breaking that we receive from customers. ■ The head of the screw can be designed in various shapes such as cross slots or hexagons according to your requirements. * For data or material requests, please feel free to contact us through the Yamashina website: http://www.yamashina.ne.jp/

Price range

Delivery Time

※The delivery date may vary depending on the quantity, so please feel free to contact us.

Applications/Examples of results

■ Used for the connection parts of wiring and piping. Particularly effective at construction sites when workers are tightening with electric screwdrivers that do not have torque setting functions or with manual wrenches. ■ Assembly of parts that cannot be opened once sealed due to regulations or other reasons. *For data or material requests, please feel free to contact us through the Yamashina website: http://www.yamashina.ne.jp/

Detailed information

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  Structure of screw-cutting screws 1. Insert the threaded part into the female thread and twist the head to rotate it like a regular screw, initiating the fastening. 2. The stopper makes contact with the counterpart material, stopping the rotation and generating axial force. 3. If you continue to screw, the head side will break off from the screw-cutting groove at the optimal torque. 4. To remove it, grasp the return portion with pliers or similar tools and rotate it in reverse. For the prevention of tampering or fraud, it is also possible to design products without a return portion.