[M8×50]

Hex hole bolts are suitable for tightening in narrow places where spanners and wrenches are difficult to work. Head height is lower and wider than hexagonal bolts, and is primarily used when you want to tighten the head with a hex wrench, or where you do not want to make the head stand out. Features a rounded head shape and is also known as a button cap. Since there are no corners, it may be selected for safety performance. The surface of the steel is treated to prevent rust by forming a delicate oxidation film. RoHS 2 compliant product.