Bolts are usually identified by their drive style. Unlike the typical Phillips or Slotted drive, hex bolts are characterized by their six-sided (hexagonal heads). Hexagonal bolts or hex bolts are a unique style of fasteners used in various purposes and industries such as construction, automobile, and engineering. Hex bolts are known to be versatile suitable for fixing different materials. This is not to be confused with Grade 5 cap screws, however. Grade 5 cap screws has tighter tolerances compared to hex bolts. The hexagon head is convenient for gripping with tools from all angles and can also be grabbed by hand. This feature makes hex bolts very easy to loosen and tighten because there is space to use your tools from any direction. They are especially used for infrastructures that require a sturdy fastener with high tensile strength properties that would be efficient for their design base and materials. The main uses for hex bolts are in docks, bridges, highway structures and buildings. With its versatility, its application is not limited. Grade 5 Hexagonal Bolts are made of medium carbon zinc which is heat-treated to increase its hardness. However, if your application involves heavier materials, you may need Grade 8 bolts, otherwise, Grade 5 bolts can be used. Grade 5 Bolts are equivalent to Metric 8.8 bolts. This bolt can often be identified by the 3 marks on the head.