high quality self drilling concrete screws  

high quality self drilling concrete screws is a kind of wood screw. high quality self drilling concrete screws is a screw with self tapping drilling hole head at the front end of the screw, which is also called self tapping self drilling screw. According to the difference of drill tail, it can be divided into: round head rice / Cross / plum blossom, countersunk head (flat head) / rice / Cross / plum blossom, hexagonal Huasi, round head Huasi (big flat head), horn head, etc. In fact, there is a great connection between the two. "Self drilling screw" must be "self tapping self drilling screw", referred to as "self drilling screw". Because there is a drill tail, it is also called "drill tail screw" high quality self drilling concrete screws is mainly used for fixing the color steel tile of steel structure and the thin plate Product Description Product high quality s…