Heavy hex bolts from 1/2″, diameter through 2-1/2″, diameter in most ASTM, AASHTO, and SAE specifications. Grades: 4.8 8.8 10.9 12.9 Material: Q235B Q355B 35# 45# 40Cr 35CrMo Surface: Original Boiled black Hot-dip galvanized Cold galvanizing
Several ASTM specifications require a hex head that is larger than a standard (finished) hex head. These specifications include: A193, A320 and A307B. Although A325 and A490 bolts also require a heavy hex head, please refer to Structural Bolts for dimensional specifications, since these bolts have shorter thread lengths than standard heavy hex bolts.Heavy hex bolts can be used for many different applications that include fastening wood, steel, and other construction materials for projects such as docks, bridges, highway structures, and buildings. Heavy hex bolts with forged heads are also commonly used as headed anchor bolts. Heavy hex structural bolts is a mainstay of handan haosheng bolts range, especially astm a325, a490,DIN6914 which are mostly required and used in construction projects like tunnel and bridge, railway, oil and gas, as well as wind energy industry.Steel structure bolt is a kind of high strength bolt, and also a kind of standard parts. Fastening performance is better, used for steel structure, engineering, so that the fastening effect. In general steel structure, steel structure bolts are required to be above grade 8.8, as well as grade 10.9 and grade 12.9, all of which are high strength steel structure bolts. Steel structure bolt is divided into torsional shear type high-strength bolt and large hexagonal high-strength bolt, large hexagonal high-strength bolt belongs to the high strength level of ordinary screw, and torsional shear type high-strength bolt is the improvement of large hexagonal high-strength bolt, in order to better construction. The construction of steel structure bolts must be first tightened and then tightened, and the steel structure bolts need to use impact type electric wrench or torque adjustable electric wrench; And the final tightening steel structure bolts have strict requirements, the final tightening torsion shear steel structure bolts must use torsional shear type electric wrench, the final tightening torque steel structure bolts must use torsional type electric wrench. The large hexagon structural bolt consists of one bolt, one nut, and two washers. Large hexagon bolts for steel structure. Torsional shear steel structure bolt consists of a bolt, a nut and a washer.