Advantages of self-tapping screws

General refers to the pointed, thick teeth, hard texture of wood screws, but also aluminum, plastic, for non-metallic or softer metals, without bottom hole and tapping; self-tapping screws are pointed, so as to "self-tapping"; ordinary screws are flat-headed, the same thickness, so what are the advantages of self-tapping screws? Let's learn about

1, are generally made of carburized steel (99% of the total product). Can also be made of stainless steel or non-ferrous metals.

2, the product must be heat-treated. Carbon steel self-tapping screws must be carburized, stainless steel self-tapping screws must be solution hardening treatment. In order to make the self-tapping screws to meet the standard requirements of mechanical properties and use of performance.

3, the product surface hardness is high, the core toughness is good. That is, "internal flexibility and external rigidity". This is a major feature of the performance requirements of self-tapping screws. If the surface hardness is low, not screwed into the matrix; such as poor core toughness, a screw will break, and can not be used. So the "internal flexibility and external rigidity" is the self-tapping screws to meet the requirements of performance.

4, the surface of the product are required to surface protection treatment, generally electroplating treatment. Some products require phosphate treatment (phosphate) on the surface. Such as: wall plate self-tapping screws are mostly phosphate.

5、Produced by cold heading process. Recommend the use of high-speed cold heading machine and high-speed thread rolling machine or high-speed planetary thread rolling machine production to ensure product quality. This production of self-tapping screws with good head forming and high quality thread.