The shape of the hexagon socket bolt is: the outer periphery of the bolt head is round, and the middle is a recessed hexagon. Hexagon socket bolts are often used in machinery, mainly for easy fastening and disassembly, and not easy to slip corners.

The performance level of the bolt refers to the nominal tensile strength value and yield ratio of the bolt material. The grade is divided into more than 10 grades such as 3.6, 4.6, 4.8, 5.6, 6.8, 8.8, 9.8, 10.9, 12.9, among which bolts of grade 8.8 and above are made of low-carbon alloy steel or medium-carbon steel and have been heat-treated (quenched, tempered, etc.) ), commonly known as high-strength bolts, the rest are commonly known as ordinary bolts. The meaning of the bolt performance grade is an international standard. The bolts of the same performance grade have the same performance regardless of their material and origin.

Qingdao Haorui Steel Products Co., Ltd. is a professional manufacturer of fasteners. The company specializes in various bolts, rivets,Shaped rivetsThe production and processing of special-shaped fasteners and non-standard parts. At present, our company produces all kinds of carbon steel, stainless steel and other special non-standard products of grade 8.8, 10.9, 12.9, etc. The implementation standards include national standard GB, German standard DIN, and American standard. Standard AN5I, Japanese standard JIS, international standard ISO, etc.