Screws are everywhere in our life, from watches to planes. Screws are everywhere. The screw should be one of the greatest inventions and is indispensable in our life. I think as long as there is the industry in the world, screws will not become obsolete. Because screws are widely used, there are many kinds of screws. We usually have one-word screws and cross screws. So why are screws divided into crosses and characters?
The word screw was invented before the cross screw. It was a long time after the word screw was invented that the screwdriver was invented by people. I wonder if you, like me, have used scissors to screw a word without a screwdriver? But have you noticed that the word screw is easily screwed out? Therefore, one-word screws are disposable.
Although the cross screw is not easy to be screwed out, it is completely impossible to unscrew the cross screw without a screwdriver. However, when screwing the cross screw, the cross screw can better bite the screwdriver, and the cross screw is not easy to be damaged. So cross screws are more durable. For more precise parts such as mobile phones and watches, cross screws are usually used. Therefore, one-word screws and cross screws have different uses.
Because, when the wood screw and the cross screw are screwed by the screwdriver, the stress area is very small, so it is easy to be damaged. Therefore, more different screws were invented later, such as hexagon socket screws, etc., but different screwdrivers were needed to cooperate with different screwdrivers. Therefore, it is more convenient for daily household use to use ordinary one-word screws and cross screws.
The above are the relevant contents of screws, hoping to be helpful to everyone.