High strength large hexagon bolt for steel structure

"High strength large hexagon head bolt connection pair for steel structure" belongs to the connector used in "friction type high strength bolt connection of steel structure".
1: Connector material
1: Performance grade of high strength bolt: 10.9s
20MnTiB material standard for ≤ M24 material GB / T 3077 ML20MnTiB material standard GB / T 6478
Material ≤ m3035vb
2: Nut performance grade 10h
Material 45 × material standard GB / T 699
3: Washer HRC 35-45
Material 45 × material standard GB / T 699
2: Torque coefficient of coupling pair
High strength large hexagon bolt connection pairs are supplied according to the guaranteed torque coefficient. The average torque coefficient of the same batch of coupling pairs is 0.110-0.150. The standard deviation of torque coefficient should be less than 0.01%. The nuts, bolts and connections shall be made in the same batch.
The guarantee period of torque coefficient is 6 months from the date of delivery.

3: The basic size of bolt and nut thread shall comply with the provisions of GB / T 169 coarse thread common thread, and the tolerance zone of bolt thread shall be 6G of GB / T 197. The tolerance zone of nut is 6h according to GB / T 197
Torsion shear type high strength bolts for steel structures
1: The material requirements of torsional shear bolt are the same as those of large hexagon bolt, which are 20MnTiB and 35VB respectively
2: The torsional shear bolts are supplied according to the tightening axial force, and the specific requirements are as follows
3: The thread dimension tolerance requirements of twist shear bolts and nuts are the same as those of large hexagon bolts and nuts. Each set of connection pair consists of 1 bolt, 1 nut and 1 washer.
The company's main business: high strength bolt, high strength nut, steel structure bolt, steel structure nut, grid sealing plate, grid bolt, etc.