Truss head machine screw with cross hole. [Features] Truss head machine screw with cross hole. Can be used in places where the head is not suppressed. The seat is large, so it prevents the seat from recessing. Unichrome plated for improved corrosion resistance [How to use] (1) Used for general tightening of materials smaller than bolts. (2) The head is larger than the pan head, so it is convenient to hide the mounting holes for tightening parts. (3) Corrosion resistant compared to fabric