Introduction To The Classification Of Hexagon Socket Bolts

Hexagon Bolts (partially threaded)-Grade C and hexagonal head bolts (full thread)-Grade C. Also known as hexagon head bolts (rough) wool hexagon head bolts and black iron screws. Commonly used standards can be found in SH3404, HG20613, HG20634, etc.

Hexagonal bolt: a type of fastener consisting of two parts: head and screw (cylinder with external thread). It needs to be matched with a nut to fasten and connect two parts through holes. This type of connection is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection.

Hexagon socket bolts are classified according to the hardness of the screw wire, tensile force, yield strength, etc., that is, the grade of the hexagon socket bolt, and what is the grade of the hexagon socket bolt. Different product materials require different grades of hexagon socket bolts to correspond to them. Hexagon Socket Step Screws all have the following grades: Hexagon socket step screws are divided into ordinary and high strength according to their grade strength. Ordinary hexagon socket bolts are grade 4.8, and high-strength hexagon socket bolts are grade 8.8 or higher, including grades 10.9 and 12.9. Class 12.9 hexagon socket bolts generally refer to knurled, natural black hexagon socket head screws with oil.