self tapping screws

The difference between self tapping screws and ordinary screws is that ordinary screws must have the screw holes machined first before they can be screwed into the wall (or working surface). Self tapping screws do not require pre-processing of threaded holes and can be self-tapped when screwed in. To achieve the purpose of self-tapping, this type of hexagonal drill screw usually has a pointed tip to facilitate its squeezing into the object to be screwed into. If you need any assistance, please contact Hongyu. We not only guarantee quality but also offer you comprehensive after-sales service.

Processing process

Pickling removes the oxide film on the material surface, forming a phosphate film on the surface and minimizing the roughness of the wire surface and scratches on the mold caused by debris.

Wire drawing, also known as wire drawing, is the process of pulling metal wire onto a cold heading machine.

Stamping forming first forms the head of the self-tapping screw, which is mostly countersunk head, round head, large flat head, hexagon socket outside, hexagon socket inside, etc.

Thread rolling forming involves passing self-tapping threads through a die to form threads.

Since self tapping bolts needs to enter its working surface by itself, heat treatment is required to increase its hardness.

Surface treatment and anti-corrosion are carried out to extend the service life. In some scenarios, there are other special requirements, such as aesthetics. HY has environmental quality requirements for export products and usually adopts trivalent white zinc dephosphorization treatment, also known as environmentally friendly white zinc.

Advantages

Because it can tap threads that match itself, it has a high anti-loosening ability when tightened and can be disassembled and reused. Among the small screw products, tapping screw outperforms other screws in terms of size, thread shape, head shape and tapping performance. This product features irreplaceable characteristics and is widely used in engineering fields due to its high strength, one-piece molding, and single-side assembly.

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