Yizhong Screw Mould Factory produces and sells all kinds of metric, imperial and American thread rolling boards (also known as thread rolling boards, thread rolling boards), including: steel thread rolling boards, stainless steel special thread rolling boards, etc., with rich specifications , Excellent cost performance, our factory has a large inventory of more than 3000 sets of dental plates all the year round.

The use of self-tapping screws is more advanced than ordinary screws. The drilling of self-tapping screws does not require tapping holes. The screws used are different from the general ones. The head is pointed and the pitch is relatively large. A wire tap is a bit like it. It can be screwed in directly without tapping. This method is usually used for metals and plastics. There are many types of self-tapping screws, but they have the same characteristics, and there are five main characteristics.

1. Generally, it is made of carburized steel (accounting for 99% of the total products). It can also be made of stainless steel or non-ferrous metals.

2. The product must undergo heat treatment. Carbon steel self-tapping screws must be carburized, and stainless steel self-tapping screws must be solid solution hardened. In order to make the self-tapping screw meet the mechanical performance and use performance required by the standard.

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3. The product has high surface hardness and good core toughness. That is "soft inside and rigid outside." This is a major feature of the performance requirements of self-tapping screws. If the surface hardness is low, it cannot be screwed into the matrix; if the core toughness is poor, it will break when screwed, and it cannot be used. Therefore, "flexible inside and rigid outside" are self-tapping screws that meet the performance requirements.

4. The surface of the product needs surface protection treatment, usually electroplating treatment. The surface of some products needs to be treated with phosphate (phosphating). Such as: wallboard self-tapping screws are mostly phosphated.

5. It is produced by cold heading process. It is recommended to use high-speed cold heading machine and high-speed thread rolling machine or high-speed planetary thread rolling machine to ensure product quality. The head of the self-tapping screw produced in this way is well formed and the thread quality is high.