Yellow zinc hexagonal drill screws

Self-drilling and self-tapping screws can be directly drilled, tapped, and locked on the setting materials and basic materials at one time, and can be quickly and automatically drilled and directly screwed and fixed, which saves construction time to the greatest extent, improves engineering construction efficiency and enhances economic benefits. The self-drilling and self-tapping screws riveted connected parts have strong binding force, high preload, and high stability of the connected parts. The difference between self-drilling and tapping screws and ordinary self-tapping screws is that when ordinary self-tapping screws are connected, they must go through two processes: drilling (drilling threaded bottom holes) and tapping (including fastening connection), while self-drilling and tapping screws directly combine the two processes of drilling and tapping when they are connected. The drill screw is characterized by low screwing torque and high locking performance, which has better working performance than ordinary self-drilling and self-tapping screws, and can be used instead of machine screws. The drilling screw is mainly used for the connection and fixing of some thinner plates, such as the connection between the color steel plate and the color steel plate, the connection between the color steel plate and the purlin, the wall beam, etc., and its penetration capacity is generally not more than 6mm, and the maximum is not more than 12mm. Drilling screws are widely used, suitable for stainless steel plates, metal steel plates, galvanized steel plates, or other engineering installations, metal curtain walls, metal light compartments, plastic steel doors and windows and other indoor and outdoor installation, channel steel, iron plates and other metal materials combined installation and other steel structure installation. Common assembly projects such as automobile compartments, containers, shipbuilding, refrigeration equipment, and environmental engineering are inseparable from drilling screws.