316 stainless steel hexagon bar is a type of stainless steel bar that has six sides and a hexagonal cross-section. It is made from the 316 stainless steel alloy, which is similar to 304 stainless steel but with the addition of molybdenum. This addition of molybdenum gives 316 stainless steel higher corrosion resistance properties, particularly in chloride environments. Diameter is measured across flats.