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Ningbo Sunrise Fasteners Co.,Ltd

Add:No.21 GaoYa Road,JiangShan Industry,Yinzhou District,Ningbo City




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Main features of Self Tapping Screw
Nov 29, 2018

Although there are many varieties of Self Tapping Screw, they all have the following main features:

(1) Usually made of carburized steel (99% of total commodities). It can also be made of stainless steel or non-ferrous metals.

(2) It is necessary to pass the heat treatment for the goods. Carbon steel Self Tapping Screw are required to be carburized, and stainless steel Self Tapping Screw are necessary to be solid solution hardened. In order to make the Self Tapping Screw reach the mechanical function and function of the standard request.

(3) The appearance of the product is high in hardness and the core resistance is good. That is, "inner soft outside just." This is a feature of the Self Tapping Screw function request. If the hardness of the outer surface is low, it will not be screwed into the base; if the core is poor in resistance, it can not be used once it is broken. Therefore, "inner soft outer just" is a request for satisfactory use of the Self Tapping Screw.

(4) The appearance of the goods requires external protection, usually electroplating. Some products have to be phosphated (phosphorylated). Such as: wall panel Self Tapping Screw are mostly phosphating.

(5) Produce with cold heading technology. The recommendation is to use a high-speed cold heading machine and a high-speed wire rolling machine or a high-speed planetary rolling machine to ensure the quality of the goods. The head of the self-tapping screw thus produced is well formed and the thread quality is high.


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