Brief introduction of the screws fasteners hardware

★The role of screws fasteners hardware thread
☆ fastening and connection
☆ Transmission
☆ sealing effect

★ History of thread development
☆Machine screw: When assembling, first drill the tapping on the assembly. The inner teeth of the tapped teeth are the same as the external thread of the screw, and assembled with a small torque.
☆ Self-tapping thread: Drill holes in the assembly before assembly. It is not necessary to tap the inner teeth and assemble with a large torque.
☆ Self-drilling thread: It is used directly on the assembly, and the screw drilling and tapping is formed once.

★Screws fasteners hardware rolling method
☆ Turning: The material is brought to the desired shape by removing the material.
Advantages: High processing accuracy, no mold restrictions.
Insufficient: high production costs and slow processing speed.
☆Forging: The material is deformed by external force extrusion to achieve the desired shape.
Advantages: fast production speed and low cost, suitable for mass production.
Insufficient: Due to the limitations of the mold, the cost of the mold for complex products is high.

★ Screws fasteners hardware cold heading process
Cold heading is a process in which a metal wire is pressed and deformed by an external force in a state where the metal wire is not heated. The cold heading process is only one type of forging process.

If you want to know more screws fasteners hardware, please contact us: kalyn@szsst88.com