A Hex Flange Bolt is a type of bolt that combines the features of a hex bolt with an integrated flange. The flange is a washer-like base under the bolt head that distributes the load over a larger area, providing several advantages in various applications. Typically made from various grades of steel, including stainless steel, carbon steel, and alloy steel. They may also have coatings for additional corrosion resistance, such as zinc plating or galvanized finishes.