The characteristics and common types of self-tapping screws


In daily life and industrial production and manufacturi […]

In daily life and industrial production and manufacturing, screws have always played an important role, and in the future, its role will continue to play. As a common member of screws, self-tapping screws do not need to be matched with nuts, so its cost is relatively low, and its use is also more convenient. Since the self-tapping screw is very special, it has a wide range of uses. It plays a role that many other screws cannot replace. Generally, automatic screws are mostly used for thin metal plates, such as steel plates and steel plates, saw plates and saws. For the connection between the plates, when connecting, it is necessary to make a threaded bottom hole for the connector, and then screw the self-tapping screw into the threaded bottom hole of the connector. The surface hardness of the self-tapping screw itself is relatively high. The thread can be tapped in the threaded bottom hole of the connecting piece, so as to effectively achieve the connection of the connecting piece. Here are some of its characteristics and common types.

 Features of self-tapping screws

  (1) Self-tapping screws are produced and processed by carburizing steel.

  (2) Heat treatment is required during processing to make its mechanical properties meet the requirements.

  (3) Self-tapping screws have good internal toughness and high surface hardness.

  (4) The surface needs to be protected by electroplating.

  (5) Cold heading process is required during production to improve thread quality.

There are many types of self-tapping screws, the common ones are as follows

   1. Ordinary self-tapping screw: This is the most common type, and the surface of the screw is mostly electroplated.
  2. Self-cutting and self-tapping screws: The thread of this type of screw is generally self-tapping thread or machine thread.
  3. Self-extrusion and self-tapping screws. Most of the screw cross-sections are triangular in shape, and generally do not need grooves when used.
   There are many types of self-tapping screws, only part of which is listed above, and as people’s demand for screws changes, I believe that more types will appear in the future.

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