China Manufacturer Drywall Screw Half Thread

Screws and screw rods are different from each other. Screws are generally called wood screws; It is the kind with sharp head at the front end, with large screw pitch. It is generally used to fasten wooden and plastic parts. The screw rod is a machine screw (mechanical screw), which is the flat head type at the front end. The screw pitch is small and uniform. It is generally used to fasten metal and machine parts.

Screws play an important role in industry. As long as there is industry on the earth, the function of screws will always be important. Screw is a common invention in people's production and life for thousands of years. According to the application field, it is the largest invention of mankind.