Truss head tapping screws with cross holes. Made of stainless steel, it has excellent corrosion and heat resistance. [Features] Truss head tapping screw with cross hole. The seat is large so it can prevent the seat from recessing. The opponent part requires a prescription hole. Made of stainless steel, it has excellent corrosion and heat resistance. [How to use] (1) Use when tightening to thin steel plates. (2) Self-tapping on steel plate (thinner than thread pitch) with prescription underholes. (3) The head is larger than the pan head, so it is convenient to hide the mounting holes of tightening parts. (4) It has excellent corrosion resistance, so it can be used in places with high humidity.