The head of the hexagonal socket bolt is eccentric or skewed, which may cause serious problems. For example, from the appearance of the product, it is not aesthetically pleasing overall. Another issue is the eccentricity, which can easily cause the production tool to break easily. The most serious problem can also lead to a series of problems such as broken heads of hexagonal bolts.

The meaning of the performance grade of hexagonal socket bolts is an internationally recognized standard. Bolts with the same performance grade, regardless of their material and origin, have the same performance, and only the performance grade can be selected for design.

The grading of hexagonal bolts is basically like this, and the prices in the market will definitely vary depending on the grade. The price of high-strength hexagonal bolts is definitely much higher than that of ordinary hexagonal bolts. The four types commonly used in the market are 4.8, 8.8, 10.9, and 12.9.