Do you know the difference between an internal hexagonal screw and an external hexagonal screw?

In daily life, we will find that hexagonal screws are divided into  internal hexagonal screws and external hexagonal screws. Some consumers have little knowledge of the difference between internal hexagonal screws and external hexagonal screws. Below, let’s take a look at the differences between internal hexagonal screws and external hexagonal screws for your reference.

The screws of internal hexagonal screws are divided into internal and internal hexagonal screws according to the different shapes of the screw heads, and are not related to the material of the screws or the bearing capacity of the screws.
The outer edge of the screw head of an internal hexagonal screw is circular, with a concave hexagonal shape in the middle. The external hexagonal screw is the type of hexagonal screw that we commonly see with hexagonal edges on the screw head.

The difference between internal hexagonal screws and external hexagonal screws:

The internal hexagonal screws are commonly used in machinery. They are mainly easy to fasten, disassemble, and not easy to slip. Hex key is generally a 90 ° curved curved ruler shape. The curved end is long while the short side is short. When you use the short side to screw, the long side can save a lot of force and tighten the screws better. The long end is further divided into a round head (a hexagonal cylinder similar to a sphere) and a flat head. The round head can be easily tilted for disassembly and installation in certain areas that are not convenient for wrenching.

The manufacturing cost of an external hexagonal screw is much lower than that of an internal hexagonal screw. Its upper end and screw head (where the wrench is subjected to force) are thinner than the internal hexagonal screw, and in some places, the internal hexagonal screw cannot be replaced. In addition, machines with low cost, low power intensity, and low precision requirements use much fewer internal hexagonal screws than external hexagonal screws.

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