Relative Knowlege: A self-drilling screw is a type of screw that has similar design features with a drill bit with a tip that enables it to drill its own hole. As the name implies, self-drilling screws do not require a pilot hole in order to perform as a fastener. They are designed to work on soft steel, wood, and metals. The selection of self-drilling screws requires the examination of certain parameters in relation to their use. The initial and practical aspect is the thickness and type of material to be joined since certain self-drilling screws are designed for specific materials. Another important aspect of self-drilling screws is their drill load or the amount of force placed on a drill during install. When making the decision to use a self-drilling screw, it is important to first consider the type of materials to be connected. The key factors for an efficient, operating self-drilling screw are the types of points, which include the flute, length, and wings. Self-drilling screws for metal roofing are specially designed with a washer to form a tight seal when fastening. As with all self-drilling screws, they have a drill bit formed point that makes inserting them quick and easy. Handan City Tiancong Fastener Manufacturing Co., Ltd. Is an IS09001 approved factory, located in Yongnian Weizhuang Industrial Zone, Handan City, Hebei Province, China Fastener Manufacturing Base, with more than 30 years of professional manufacturing experience in fastener industry. The annual capacity of GB, DIN, IFI, BS, JIS and ISO standard and non-standard fasteners can reach over 30,000 tons. Welcome to contact us for the required solution.