Why do screws have so many head types?

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pinkledstone

Age: 2023
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Screws refer to a tool that gradually tightens a part using the mathematical and physical principles of the beveled circular rotation and friction of an object. Screws are a common fastener that is widely used in daily life and production. The general material is plastic or metal, and the grooves engraved on the surface are called threads, which are cylindrical.
Hexagon head, hexagon head with flange, square head, T head, mushroom head, cheese head, round head, pan head, countersunk head, raised countersunk head.
One-line slot, inner triangular slot, inner corner quad slot, cross slot, rice slot, flower slot, plum blossom slot, flower one-line slot, special slot, and hexagonal slot.
1. In many cases today, one-line head screws have been replaced by cross head screws. Because the one-line head screw is more likely to be screwed so that the pattern on it cannot be seen clearly, the screwdriver cannot be used. The contact area between the one-line head and cross head type and the tool is much smaller than the contact area between the inner and outer hexagon head and the tool. Therefore, there will be no problem with distortion and failure of the inner and outer hexagons.
2. Regarding countersunk head screws and non-countersunk head screws. The bases of laptops in our lives are countersunk screws. However, due to the complexity and cost of processing, it is not necessary to use countersunk head screws on some unnecessary occasions.
Posted 15 Sep 2022

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