Hexagon socket head bolts are constructed by special power tools, drilling, tapping, fixing and locking are completed at once. Self-tapping screws are mainly used for the connection and fixing of some thin boards, such as the connection of color steel plate and color steel plate, the connection of color steel plate and purlin, wall beams, etc. Its penetration capacity is generally not more than 6mm, and the maximum is not more than 12mm.

Self-tapping screws are often exposed to the outdoors and have strong corrosion resistance; their rubber seals can ensure that the screws do not seep water and have good corrosion resistance.