They require a pre-drilled hole with compatible female thread Hex Bolts feature a six-sided head, which is designed to be tightened using a wrench or drill Hot Dipped Galavanized Country of Origin: China

Product Description Hex Bolts are bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. This bolt is compatible with standard nuts and washers of the same thread pitch, grade, and finish. These bolts are fully threaded. From the Manufacturer Hex Bolts are bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. This bolt is compatible with standard nuts and washers of the same thread pitch, grade, and finish. These bolts are fully threaded.