From the perspective of appearance

大六角头高强度螺栓和扭剪型高强度螺栓外形不一样，大六角头头部是六角型的。扭剪型头部是半圆形的，而且螺栓尾部还有一个梅花头。

The appearance of high-strength bolts with large hexagonal heads is different from that of torsion shear type high-strength bolts, and the large hexagonal head is a hexagonal type. The torsion shear type head is semi circular, and there is also a plum blossom head at the end of the bolt.

钢结构用：大六角螺栓螺母垫圈

For steel structures: large hexagonal bolts, nuts, and washers

钢结构用：扭剪型高强度螺栓连接副

Steel structure: torsion shear type high-strength bolt connection pair

从安装方式上看

From the perspective of installation method

大六角头高强度螺栓用扭力扳手安装。扭剪型高强度螺栓在安装过程中通过尾部的梅花头控制，利用扭矩的反力将螺栓逆向旋紧，直到螺栓的直齿状尾端破断为止。

Install high strength bolts with large hexagonal heads using a torque wrench. During the installation process of torsional shear type high-strength bolts, they are controlled by the plum blossom head at the tail, and the reverse force of the torque is used to tighten the bolts in reverse until the straight toothed tail end of the bolts is broken.

从配套方式上看

From the perspective of supporting methods

大六角头高强度螺栓和扭剪型高强度螺栓配套不一样。大六角每套是配一个螺栓一个螺母二个平垫。而扭剪型是一个螺栓一个螺母以及一个平垫。

The matching of large hexagonal high-strength bolts and torsion shear high-strength bolts is different. Each set of large hexagon is equipped with one bolt, one nut, and two flat washers. The torsion shear type consists of a bolt, a nut, and a flat washer.

从扭矩的控制上看

From the perspective of torque control

大六角高强度螺栓的扭矩是由施工工具来控制，而扭剪型高强度螺栓属于自标量型螺栓，其施工紧固扭矩是由螺杆与螺栓尾部梅花头之间的切口直径决定，即靠其扭断力矩来控制，施工时要采用专用电动扳手。

The torque of large hexagonal high-strength bolts is controlled by construction tools, while torsion shear high-strength bolts belong to self scalar bolts. The construction tightening torque is determined by the diameter of the incision between the screw and the end of the bolt's plum blossom head, which is controlled by its breaking torque. Special electric wrenches should be used during construction.

总的来说，大六角高强螺栓属于普通螺丝的高强度级，而扭剪型高强螺栓则是大六角高强螺栓的改进型，虽然是同一种螺栓，但是在一些细微方面还是有很大不同的。两者相比，扭剪型高强度螺栓更具有施工方便，检查直观，受力良好，保证质量等优点，在高层钢结构工程上绝大部分都采用这种形式。

Overall, large hexagonal high-strength bolts belong to the high-strength grade of ordinary screws, while torsional shear high-strength bolts are an improved version of large hexagonal high-strength bolts. Although they are the same type of bolt, there are still significant differences in some subtle aspects. Compared to the two, torsion shear high-strength bolts have the advantages of convenient construction, intuitive inspection, good stress, and quality assurance, and are mostly used in high-rise steel structure engineering.