Black hex head bolts are commonly made from steel, often alloyed with other elements to improve strength and durability. The most common grades used in manufacturing these bolts are Grade 8 and ASTM A325, which are known for their high tensile strength. In addition to steel, these bolts may also be made from stainless steel or other materials that offer specific mechanical properties suited for particular applications.

Additionally, chemical anchors offer versatility in installation. They can be used in a wide range of conditions, including cracked concrete and environments with variable temperatures. Furthermore, they significantly reduce the risk of spalling concrete, which can occur with mechanical expansion anchors, thereby preserving the integrity of the substrate.