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What is a self-tapping screw, what are the characteristics of self-tapping screws or the difference from ordinary screws?


1. Different in nature

1. Self-tapping screws

Self-tapping screw is a kind of screw with a drill bit. It is constructed by special electric tools, and drilling, tapping, fixing and locking are completed at one time.

2. Ordinary screws

It refers to the more common and commonly used, more common, not special-shaped screws are ordinary screws.

Two, different characteristics

1. Self-tapping screws

On the material to be consolidated, relying on its own thread, the consolidated body can be "tapped-drilled, squeezed, pressed" to produce corresponding threads, so that they can be closely matched with each other, and can be directly screwed in without tapping.

2. Screws

Ordinary screws are all flat-headed, with the same thickness, and need to have screw eyes and tapping teeth before they can be used.

Three, applicable to different

1. Self-tapping screws

For non-metals or softer metals without priming and tapping.

2. Screws

It is used for non-metal or metal that needs drilling and tapping relatively hard.

Self-tapping screws are quick-release fasteners made of steel with galvanized surface passivation. Self-tapping screws are mostly used for the connection between thin metal plates (steel plates, saw boards, etc.). When connecting, first make a threaded bottom hole for the connected part, and then screw the self-tapping screw into the threaded bottom hole of the connected part. Generally, self-tapping screws refer to screws whose teeth are self-tapping pointed tails, or self-tapping flat tails, which can directly tap into the screws in the workpiece.

The flat-head screw refers to the flat head of the screw. It is not specified whether it is a mechanical thread or a self-tapping thread, so the flat-head screw may also be a flat-head self-tapping screw.

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