What is a tapping screws

Self-tapping screws generally refer to pointed, coarse-toothed, hard-wood screws, as well as aluminum alloys and plastics. A special self-tapping screw for metal hole tapping is called wire tapping.

Self-tapping screws are used for non-metal or soft metal, no need to play low hole and tapping; self-tapping screws are self-tapping screws, so that they can be "self-tapping"; the general screws are flat, and the thickness is common.

The self-tapping screw is said: the hole of the drill is a hole that does not require tapping. The screw used is different from the general one. The head is pointed and the tooth pitch is relatively large. It is similar to the chipless tapping and can be directly rotated without tapping. Access, metal and plastic generally use this method. It can "tapping-drilling, squeezing, pressing" the corresponding threads on the consolidated materials by their own threads to make them fit closely to each other. Self-tapping screws are often used for the connection between thin metal plates (steel plates, saw blades, etc.).

When connecting, first make a threaded bottom hole for the engaged piece, and then screw the self-tapping screw into the threaded bottom hole of the engaged piece. Since the threaded surface of the self-tapping screw has a high hardness (≥HRC45), the internal thread can be tapped in the threaded bottom hole of the engaged piece and then formed into a joint. Self-tapping screws can also be used as anti-loosening screws, just apply anti-falling, anti-loose glue and so on. Therefore, the self-tapping screws are also called self-tapping screws that can be loosened.