countersunk head self tapping screw

Hex screws, or hexagon socket screws, are fasteners characterized by their hexagonal shape, which allows for a firm grip when using a hex wrench or socket. Typically made from durable materials such as stainless steel or hardened carbon steel, they come in different lengths and diameters to suit various projects. Their unique design offers a significant advantage over traditional screws, as they can bear higher torque, making them less likely to strip during installation.


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The primary function of wedge bolts is to firmly attach the wooden or metal forms to the concrete foundation or structural steel. This ensures that the forms maintain their position during the pouring and setting of the concrete, preventing any displacement or leakage that could compromise the integrity of the structure. The bolts' ability to withstand high tensile forces is critical in withstanding the pressure exerted by wet concrete and the subsequent curing process.

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A black hex head bolt features a hexagonal head that allows for easy tightening and loosening using standard tools, such as a wrench or socket. The black designation often refers to the finish applied to the bolts, which typically involves a coating such as black oxide or a similar treatment. This finish not only enhances the bolt’s appearance but also provides superior corrosion resistance, making them suitable for a variety of environments.


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