Head is a countersunk shaped machine screw with a cross hole driver slot. This is a standard flat screw that is widely used in various fields. The length of the flat head screws is represented by the total length including the thickness of the head. This product is a JIS certified manufacturer product. Pan bolts, Sarah screws, Saraco screws, Saraco screws, Sarah screws, Sarabiss, and Plate Screws.