Screws are essential industrial necessities in daily life, ranging from the use of digital cameras, myopia glasses, clocks and electronic equipment to the application of engineering projects, engineering buildings, roads and bridges and other places. Therefore, there are many types of screws. Hexagonal screws are used more frequently because of their simplicity, convenience and practical operation. But hexagon screws are also divided into inner hexagon and outer hexagon. What's the difference between them?
1. From the appearance: the screw head of the hexagon socket head
screw is round on the outside and concave hexagon in the middle, and the hexagon screw is the kind in which the edge of the screw head is hexagonal. The hexagonal screwdriver looks like "7". Cut both sides of the hexagonal steel wire and bend the sheet metal to 90 degrees to form an hexagonal screw wrench. The hexagonal screw is the kind of hexagonal screw with hexagonal shape on the edge of the screw head.
2. Tools that must be used: the two
screws are installed and disassembled with different tools. The bearing capacity of the two screws with the same material and the same rib is the same. The key is to use them according to the specified conditions of the screw head contained in the installation position. For example, in the area where countersunk head screws must be used, it is much more convenient to tighten with socket head screws, but the countersink depth of the screw head must be much larger, and a specially equipped socket head wrench must be used, Compared with ordinary adjustable wrench, it can deal with the inconvenience of external hexagonal screws of different sizes; Therefore, use hexagon head or socket head should be selected according to the actual situation.
3. The space occupied by the hexagon socket bolt is much smaller. During installation, the hexagon socket can be installed in a deeper position, and the installation (including tightening) of the hexagon socket must have a large space.
4. The head of the hexagon socket head bolt can be sunk into the part without exposure, reducing the overall specification, beautiful appearance and not hindering other components.
5. The manufacturing cost of the outer hexagon
screw is much lower than that of the inner hexagon. Its upper wind is that the screw head (wrench bearing position) is thinner than the inner hexagon. In some areas, the inner hexagon can not be replaced. In addition, the mechanical equipment with low cost, low driving force, low compressive strength and low precision standard selects much less inner hexagon screws than outer hexagon screws.
