In the concrete fastening, when the self-tapping anchor is used for fastening, the anchor head type used is generally a hexagonal head. Due to the high hardness of the concrete, the chip requires a lot of torsion, and the hexagonal head bolt has a greater driving force, which can well meet this condition.

However, many installation parts require more than one-way fastening during the installation process. Thus, the hexagonal head has two kinds of composite head products with internal thread and external thread. The internal thread hexagonal head anchor is suitable for all kinds of ceilings and hoisting. It can be directly tightened with concrete self-tapping anchors and screwed on the screw rods. The external threaded hexagonal head anchor bolt is suitable for some external fastening units. After the anchor bolt is fastened in the concrete, external threads can also be used to fasten other units.

The different hexagonal head types of concrete self-tapping anchors make the fastening and installation of concrete more convenient, but also more diversified, so that the fastening and installation have more possibilities.