We can't ignore the machining of non-standard screws, because it will make the whole box stronger. We often see that because there are two non-standard screws on the packing box, it is difficult to open them in good condition. It is assumed that you have not removed the non-standard screws. The figure of non-standard screw is also a person's figure. Although it is small, if it is placed in the correct position, assuming that there are no non-standard screws, it is just a pile of copper and iron.

The processing of fasteners is not a simple job. The non-standard screw pattern on the non-standard screw body shall be made according to the regulations. This rule is standard. In their specialty, the commonly used standards are GB national standards, organic screws, self tapping screws, wallboard screws, fiberboard screws, drill tail screws, wood screws, hexagonal wood screws, etc. there are many classifications, including 12 kinds of screws, such as non prolapsed screws and combination screws. Its uses are different, and its head body is also different. Its head type can be divided into: hexagonal head, hexagonal head, flange face, square head, T-shaped head, flat head, cylindrical head, round head, pan head and semi countersunk head.