Grade 8.8 hexagon bolts, as the name implies, refer to hexagonal bolts with a strength of 8.8. Hexagon head bolts are bolts with hexagonal heads and external threaded bolts. The heads are designed to facilitate the use of a wrench to rotate. A type of fastener consisting of two parts (cylinder with external thread), which needs to be matched with a nut to fasten and connect two parts with through holes. Hexagon head bolts are divided into two types: external hexagon and internal hexagon. They are a widely used type of bolt. According to the material, there are iron bolts and stainless steel bolts. An outer hexagon bolt is a bolt with a trimmed hexagon head, and an inner hexagon bolt has an inner hexagon shape recessed into the bolt head.

Qingdao Haorui Steel Products Co., Ltd. can produce all kinds of fastener bolts with strengths of 4.8, 6.8, 8.8, 10.9, and 12.9. The materials used for the bolts are generally selected according to the grades of the bolts, of which the 8.8 level is above ( Grade 8.8) is a high-strength bolt, and its material is generally low-carbon alloy steel or medium-carbon steel and has been heat-treated (quenched + tempered). The so-called 8.8 and 10.9 strength grades refer to the bolts' shear stress resistance grades of 8.8GPa and 10.9GPa. Our company supports custom-made special-shaped bolts and nuts, non-standard parts, welcome new and old customers to call and negotiate!