Generally speaking, the tools used for self-tapping screws are gun drill, gas screwdriver, screwdriver, etc., but if you need to use it on a concrete wall, you need to use an electric hammer. Some cement walls are not suitable for the use of ordinary screws, especially if the wall is highly load-bea... read more
The main difference between the thread parameters of self-tapping screws and machine screws is that the pitch is large, the height of the thread is high, and the shape of the end is favorable for screwing. However, if the ordinary machine screw is screwed into a low-strength material such as plastic... read more
1. Self-tapping screws are also mostly used for connection between thin metal plates. The thread is a common thread with an arc-shaped triangular cross-section. The thread surface also has high hardness. Therefore, when connecting, the screw can also be connected The internal thread is tapped in the... read more
1. The self-drilling screw is a screw with a drill bit. Drilling, tapping, fixing, and locking are completed at one time by special electric tools. The self-drilling screw is mainly used for the connection and fixation of some thin plate parts, such as For the connection of color steel plate and col... read more
1. After driving the self drilling screw into the hole on the ground or wall, tighten the nut on the self-drilling self-tapping screw with a wrench. The screw goes out, but the outer metal sleeve does not move, so the big head under the screw is Expand the metal sleeve so that it fills the entire ho... read more
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