This is a flat head tapping screw with a cross hole. Made of stainless steel, it has excellent corrosion and heat resistance. [Features] This is a flat head tapping screw with a cross hole. The opponent part requires a counterbored process to prevent the prescription of the lower hole and head from appearing. Made of stainless steel, it has excellent corrosion and heat resistance. [How to use] (1) Use when tightening to thin steel plates. (2) Tighten the steel plate with prescription underholes. (3) No cutting powder, no nuts needed. (4) Use for tightening when the head is out and there is a disorder (5) It has excellent corrosion resistance, so it can be used in damp locations/outdoor objects.