norm dreh fasteners, German norm dreh models, norm dreh prices

norm dreh fasteners feature one or more cutting slots at the end of the thread, allowing them to cut matching internal threads in a manner similar to a tap when screwed into a pre-drilled hole, utilizing the screw tail and threads. They can be used on thick plates, relatively hard or brittle materials that are difficult to form. Self-tapping screws are screws with a drill bit tip; construction with specialized power tools completes drilling, tapping, fixing, and locking in one operation. Self-tapping screws are mainly used for connections such as between color steel sheets and purlins, where the self-tapping screws are often exposed outdoors.