Hexagon socket bolts, hexagon socket head screws, and hexagon socket screws. Although the names of these words are different, they all have the same meaning, and they all mean a kind of screw.
　

Shengxin hexagon socket screws are classified according to the hardness, tensile strength and yield strength of the screw wire, that is, hexagon socket screws. Different product materials require different grades of hexagon socket bolts to correspond to them. What are the different types of hexagon socket screws?

The types of hexagon socket screws are divided into ordinary and high-strength according to the grade strength.

Ordinary hexagon socket screws refer to grade 4.8, and high-strength hexagon socket screws refer to grades above 8.8, including grades 10.9 and 12.9. Class 12.9 hexagon socket screws generally refer to knurled, natural black hexagon socket head screws with oil.

Hexagon socket screws for steel structure connection are divided into more than 10 grades. The bolts of grade 8.8 and above are made of low-carbon alloy steel or medium-carbon steel and are heat-treated (quenched and tempered). They are generally called high-strength bolts, and the rest are generally called Ordinary bolts.