六角套筒螺栓

Hexagonal socket bolt refers to an internal hexagonal screw, an internal hexagonal cylindrical head screw, or an internal hexagonal screw. Although these terms have different meanings, they all have the same meaning, indicating a type of screw. Some procurement companies do not know how to produce hexagonal bolts because they have not studied and researched them. What kind of screw wire is required for hexagonal bolts in production, and do they need to be hardened, that is, heat treated? There are so many technical issues that buyers are not very clear about. But sometimes I really want to learn more, in order to facilitate myself when encountering these technical problems in the future.

Hexagon bolts are classified according to the hardness, tensile strength, yield strength, etc. of the screw wire, which is the grade of the hexagon bolt and what grade the hexagon bolt is. Different grades of hexagonal bolts are required for different product materials, so what are the grades of hexagonal bolts available!

Hexagon bolts are divided into ordinary and high-strength bolts according to their strength levels. Ordinary hexagonal bolts refer to grade 4.8, while high-strength hexagonal bolts refer to grades 8.8 and above, including grades 10.9 and 12.9. Grade 12.9 hex socket bolts generally refer to black hex socket cup head screws with knurled and naturally colored oil.