Torsion-shear bolts for 10.9 high-strength steel structures are mainly used for fastening steel structures. High-strength torsional shear bolts are improved high-strength bolts based on high-strength hexagon bolts. Torsional shear bolts have a semi-circular head and a torx head at the end of the bolt. In addition, torsional shear type high-strength bolts are initially used with impact type electric wrenches or torque adjustable electric wrenches. Final twisting must use torsional shear type electric wrenches; the usual configuration is composed of a bolt, a nut and a washer.
Mainly used in the construction of bridges, railways, large venues, high-rise buildings, stations and airports, hydropower stations, large playgrounds, etc.
The main specifications include: M16, M20, M22, M24, M27, M30, etc.
The main length range is: 40mm-220mm.
Product standard: GB / T 3632-2008
Surface treatment: zinc plating, phosphating, blackening, dacromet, etc.