Flange bolt is an integral bolt composed of hexagon head and flange plate (the gasket under the hexagon is fixed with the hexagon) and the screw (cylinder with external thread), which needs to be matched with the nut for fastening. Parts that connect two through holes. Its "support area to stress area word ratio" is larger than that of ordinary bolts, so this kind of bolt can withstand higher pre-tightening force and has better anti-loosening performance, so it is widely used in automobile engines, heavy machinery and other products.
