It is a new invention in recent years. Its tail is in the shape of a drill tail or sharp tail, without auxiliary processing. It can directly drill, tap, and lock on the setting material and basic material, thus greatly saving the construction time. Compared with ordinary screws, it has high tenacity and maintenance force, and it will not loosen after a long time.
Head: Countersunk, Pan
Surface: Zinc Plated, Dacromet
It is a kind of screw, which is mainly used to fix the colored steel tile of steel structure, and also can be used to fix the sheet material of a simple building. It cannot be used for metal to metal bonding.