There are many types of hardware screws, and the common ones are screws and nuts with different specifications such as GB, BS and AFS. Choose the right hardware screws need to consider the following points.
Compatibility of screws and nuts: When choosing, make sure that the screws and nuts can match each other, including nominal diameter, options, pitch, number of threads and tooth type.
Colour and length of screws: Choose the right colour of screws for the place and scenario of use, so that they are similar to the colour of the item to which they are attached. At the same time, the length of the screw should be appropriate, too long or too short will lead to unstable bite, affecting the appearance or the normal use of other parts.
Selection of screw head type: Screws with the function of imitation disassembly may be selected according to the need to consider the disassembly performance. For the case that the screws need to be stable and secure, you can choose to imitate the loosening of the screws or combination screws. Therefore, when selecting screws, it is important to choose the right product according to the usage scenario.
It is recommended to choose experienced screw manufacturers, so that you can buy high-quality hardware screws and avoid purchasing low-quality products.
In addition to common hardware screws, we sometimes use a combination of screws. Combination screw refers to a screw with a spring pad and a flat pad through the friction teeth fastened together. Another kind of combination screw is a screw with only one spring pad or only one flat pad, or a two-part assembly with only one flower tooth.
High-strength hexagon head bolts are mainly used in steel structures, such as railway and highway bridges, boiler steel structure, industrial plants, high-rise civil buildings, tower structures, cranes and other occasions requiring the use of friction-type high-strength bolts and screws. These bolts have an extra dodecagon at the end and require a special electric spanner for installation. During installation, a clockwise torque is applied to the nut and an equal counterclockwise torque is applied to the dodecagon of the bolt, so that the connecting neck between the bolt and the dodecagon is subjected to a torsional shear force until the neck breaks, and the installation is completed. This kind of torsion shear type high strength bolts is a one-time, can not be disassembled after installation.
To sum up, choosing the right hardware screws requires consideration of match, colour, length and head type. Combination screws are a special type of screws, commonly used in specific steel structure occasions. When purchasing hardware screws, it is recommended to choose experienced screw manufacturers to ensure product quality.
