Self-tapping screws do not need to match the nut, they are screwed in at the same time while drilling out the threads on the material, generally used in the hardness of the material is not high.For example, in a piece of wood screwed into a self-tapping screw, the original wood does not need to have a pre-punched threaded holes.And machine screws should have pre-punched holes and tapped threads, and then take the matching screw to screw in.

Self-tapping screws, the English name is Self-tapping Screw is in the metal or non-metallic materials in the pre-drilled holes in the self-tapping drilling with the negative thread of a threaded fastener.It is characterized by high tensile strength, single piece and single side combination.Since it is self-molded or tapped with matching threads, it has high loosening resistance in combination and can be loaded and unloaded.The size, thread type, head type, and tapping performance of small screws are virtually unlimited in engineering applications.Self-tapping screw materials can be divided into carbon steel and stainless steel.

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