Why do many devices use internal hexagonal screw?

Why do many devices use internal hexagonal screw?

What's so good about it?

Seeing a lot of design drawings, we find that almost all designs are made with inner hexagonal screw, whether the countersunk hole or not.

You may wonder why many devices use hexagonal screw. What's the good thing about it?

The screw head of the inner hexagon screw is round outside and concave in the middle. Such a structure has obvious advantages.

1. Load bearing is greater. It has six stress surfaces, which are more capable of holding the screw than the one-sided screw and the cross-shaped screw with only two faces.

Note: The material of inner hexagonal bolt is generally made of stainless steel, carbon steel and alloy steel, which is basically the same as other types of screw. The higher the performance grade, the greater the strength. When selecting the screw, the screw of suitable performance grade must be selected strictly according to the use requirements. The grade is different, and the price is also different.

2. Can be buried in processing. That is to say, the whole nut sinks into the inner part of the workpiece, which can keep the surface of the workpiece flat and beautiful.

3. Easy installation. Compared with the outer hexagon screw, the inner hexagon is suitable for more assembling occasions, especially narrow ones. Therefore, it is very convenient for assembling and repairing and debugging.

4. Not easy to disassemble. Our usual tools are movable wrenches, screwdrivers and static wrenches, and the removal of hexagonal bolts must use a special wrench, so it is not easy for ordinary people to disassemble, which is also a benefit.