As we all know, threaded fasteners generally tighten parts. Assuming that the nut has n sides, the angle of each turn of the wrench is 360/n? degrees, so the number of sides increases, and the angle of rotation decreases. In many cases, the specific location and specification of nut installation will be limited by space, and the installation space is not large. In the case of insufficient space, use a wrench to tighten the nut, and the lower the angle of one rotation, the better.
If it is square and the side length is long enough, each wrench movement of the square nut is 90 degrees and 180 degrees. Since it is necessary to leave a space for the next wrench to face, it is not suitable for installation when it encounters a narrow place. The degree of difficulty of the design staff layout nuts is shown.
Each wrench movement of the hexagonal nut can be 60 degrees, 120 degrees and 180 degrees, with a large number of combinations, it is easier to find the position of the wrench, and it is easier to arrange the installation space in narrow places. The stability is also the best in the reaction process, and there are similar hexagon socket screws.
In daily life, if the number of sides of the nut is increased, such as octagon or decagon, the angle of pattern recovery will be reduced, making it possible for the wrench to be inserted at more angles in a narrow space, but the bearing capacity The side length is also reduced, the contact area between the wrench and the nut is reduced, it is easy to be rolled into a circle, and it is easier to run off.
The hexagonal nut/cap is designed using structural mechanics and hydraulics, fully considering the specific application – the parallelism of the diagonals. If it is a screw with an odd number of sides, the two sides of the wrench are not horizontal. Long ago, there were only fork-shaped wrenches. The head of the wrench with odd sides has a horn-like opening, which is not suitable for exerting force.
In the actual production process, the processing technology of the hexagonal screw cap is also relatively simple, and the shape of the relative gender can save raw materials and ensure its performance indicators.
After the ancestors continuously summed up the experience, they chose more hexagonal nuts that are easy to operate and not easy to deviate, which not only saves their own materials but also saves space.
In practice, of course, there are non-hexagonal, pentagonal, and quadrangular items, but they are rarely used, and even less for triangular, heptagonal, and octagonal.
Post time: Mar-17-2023