Product Zhongbao Fastener focuses on high-quality fasteners, mainly producing fastener bolt, fastener screw, fastener washer, fastener nut, fastener threaded rod, etc. 1.Self-tapping screws have various names. They’re often called metal screws, sheet metal screws, tapping screws, or tapper screws. 2.Their tips come in different shapes: pointed (like a pencil), blunt, or flat, and they are described as thread-forming, thread-cutting, or thread rolling. If the screw is pointed, it will be thread-cutting – tapping and creating threads in a pre-drilled hole.If the tip is flat, it is thread-rolling – rolling or extruding threads and creating zero clearance between screw and material.3. Self-tapping screws for plastic joining is reliable if used properly. 4. They are cheap compared to other means of joining. 5. Easily disassembled. 6. It doesn’t require pre-moulded threads. 7. Good impact and vibration resistance.