Self-drilling screw  cuts off the drilled object (steel plate, aluminum plate, etc.) through the drill tail at the tail, and then directly taps the thread with the thread, and then locks it. In this seemingly simple fastening process, the most critical step is the initial drilling and cutting process. Whether the screw can penetrate the plate and whether the drilling is fast is directly related to the tail of the drilled screw.

Tail No. 1, No. 2 and No. 3 are used for drilling and fastening in steel plates, and No. 5 and No. 7 tails are used for drilling and fastening in thick steel purlins. According to the thickness of the object to be drilled, it is the most reasonable to select the corresponding drill tail model, so as to ensure the maximum drilling time and fastening efficiency.

Generally, for customers with customized drill tail screws, DD Fasteners will first consult with the customer on what plate material to use and what thickness the plate is, and then give the customer rational suggestions to select the appropriate drill tail model.

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