What is the difference between the appearance of 8.8 socket head cap screws and ordinary screws

A customer in Tianjin asked Miss Song before if it is possible to distinguish 8.8 socket head cap screws from ordinary screws in terms of appearance?

In fact, we can’t distinguish 8.8 socket head cap screws from ordinary screws from the appearance. Unless some manufacturers say that in order to distinguish high-strength screws from ordinary screws, they will mark 8.8, 10.9 and 12.9 on the head of the screw. However, not all screws with these marks on the head indicate that they are high-strength screws, because some manufacturers will sell low-strength screws as high-strength screws, so sometimes it is indistinguishable.

In order to truly distinguish between high-strength screws and ordinary screws, it is necessary to distinguish from torsion, tensile strength, material analysis, etc.

Under the same specifications, if it is high strength, the torque, tensile strength and hardness will be higher than those of ordinary screws. In addition, it is also necessary to test whether the surface hardness and core hardness have reached the standard. For general screws, there will be a standard value. According to the comparison of the standard values tested, you can know whether the screw is a high-strength screw or an ordinary screw.

If it is distinguished from the material, then you need to know that ordinary screws are generally produced using those grades of screws, such as 1008, 1010, etc. are generally used to produce low-grade screws, while 10B21, SCM435 are generally used to produce High strength screws. From the material composition report, you can know what kind of screw it is.

If you want to know more ways to distinguish 8.8 socket head cap screws from ordinary screws, please feel free to contact Shi Shi Tong screw manufacturers. Or if you know more ways to distinguish, welcome to communicate and discuss together!

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