Why are screws always hexagonal? Is there a four-pointed, five-pointed one?
It says in 100,000 Reasons Why:
A 6-sided screw can be graphically restored by twisting it 60 degrees (not sure if the expression is clear). If the space is tight, you can install the screws as long as the wrench can be twisted 60 degrees, which is a product of the mutual compromise between the screwing angle and the length of the side.
Imagine: if it is a square, the side length is long enough, but it has to be screwed 90 degrees to graphic reduction, not suitable for small space installation; if it is octagonal or 10-sided, the angle of graphic reduction is small, but the length of the side of the force is also small, easy to round; if it is a single digit side of the screws, then the two sides of the wrench are not parallel to each other, and in the early days, there was only a forked wrench, and the head of the wrench for the single digit side of the wrench was a trumpet-shaped opening, the Doesn't seem to fit the power ......
Also if you notice, the head and shank of the wrench have an angle as well. If you have even less room, flip the wrench forward and backward and it seems like you can screw in with only about 40 degrees of room.
But now there are socket wrenches, plum wrenches ...... that can be screwed at a minimum angle of 15 degrees.
And finally.
What do you guys think a sloth would do for a screw???? ！！！！！
scythe7 :
The benefits of hexagonal have been said a lot upstairs, I pick up a leak: non-hexagonal screws and nuts are also available.
For example, a nut that is used on the inside of a member and stops by the member itself will be made into a quadrilateral shape so that it can be easily secured by utilizing the most common right-angled edge of the member.
There is also a square, but in fact should be used with special tools, similar to some socket tools do not require a small travel space, but will require a large area of force, so that it is not easy to slip, so that the quadrilateral will be better than the hexagonal shape, not easy to slip. After further alienation, there is gear-shaped.
Out of the demand for anti-misuse or anti-theft, there will also be more odd bolts, such as this triangle, can only be opened with a specific tool like a lock, the general wrench can screw the quadrilateral, but can not screw the triangle, inconvenience is exactly its selling point. The internal pentagonal screws on Apple phones serve the same purpose.