Torsional shear type high-strength bolt connection pair for steel structure is mainly used in industrial and civil buildings, highway and railway bridges. Tower, pipe support, hoisting machinery and other occasions where friction type connection of torsional shear type high-strength bolt connection pair is required. The utility model is characterized in that a dodecagonal body is added at the end of the bolt.

安裝時，須用特制的電扳手，其上下有兩個套筒頭，一個套在螺母的六角體上，另一個套在螺栓的十二角體上。擰緊時，對螺母施加順時針力矩，對螺栓十二角體施加大小相等的逆時針力矩，使螺栓的末端與十二角體之間連接頸部承受扭剪，頸部剪斷為止，則安裝完成。

During installation, a special electric wrench must be used, which has two socket heads at the top and bottom, one on the hexagon of the nut and the other on the dodecagon of the bolt. When tightening, apply a clockwise torque to the nut and an equal counterclockwise torque to the bolt dodecagonal body, so that the connecting neck between the end of the bolt and the dodecagonal body bears torsional shear until the neck is cut off, and the installation is completed.

這種扭剪型高強度螺栓為一次型使用的緊固件，安裝后一般不予拆卸。騰馳五金生產(chǎn)的這種產(chǎn)品還挺不錯的，這家公司的信譽也不錯。

The torsional shear type high-strength bolt is a one-time fastener, which is generally not disassembled after installation. This kind of product produced by tengchi hardware is quite good, and the reputation of this company is also good.