扭剪型高強螺栓和大六角型高強螺栓的區(qū)別是什么？了解一下它們的定義：
What is the difference between torsional shear high strength bolt and large hexagon high strength bolt? Let's first understand their definitions:
大六角（Hex head ），英文簡稱為HSFG（High strength friction grid bolts）。顧名思義，大六角頭螺栓的螺帽是正六角形的，可以推斷出這是便于使用扳手固定的需要，這是更初使用的高強螺栓的類型。
Hex head ）， It is called hsfg (high strength friction grid bolts) for short in English. As the name suggests, the nut of large hexagon head bolt is regular hexagon, which can be inferred to be convenient for fixing with wrench. This is the type of high-strength bolt originally used.
扭剪型（troque shear style /Twist off bolts/），英文一般簡稱TCB（Tension control bolts）以示區(qū)別。其端部端部有梅花卡頭（spline-end），并且螺栓的螺帽一般是圓形（不需要使用扳手固定）；是日本人在HSFG的基礎上開發(fā)研制的改進型產品。
Torque shear style / twist off bolts /, commonly referred to as TCB (tension control bolts) in English to show the difference. Its end has a spline end, and the nut of the bolt is generally round (it does not need to be fixed with a wrench); it is an improved product developed by the Japanese on the basis of hsfg.
扭剪型和六角螺帽型高強螺栓的區(qū)別：
Differences between torsion shear type and hexagon nut type high strength bolts:
1.扭剪型高強螺栓的頭部有一梅花頭，而大六角的沒有。
1. The head of torsional shear high-strength bolt has a plum blossom head, while the large hexagon bolt does not.
2.扭剪型高強螺栓的尾部是圓的，而大六角的沒有。
2. The tail of torsional shear high-strength bolt is round, while the large hexagon bolt does not.
3.在施工方法上所使用的工具不同：扭剪型高強螺栓使用電動工具，而大六角使用的扭矩扳頭。
3. Different tools are used in construction methods: electric tools are used for torsional shear high-strength bolts, while torque wrenches are used for large hexagon.
4.確認螺栓是否已達到預緊力的方法不同：在施工中，對于扭剪型高強螺栓，只要梅花頭掉落，即可認為合格，而大六角則需要調節(jié)扭矩扳手的扭矩來確認。
4. There are different methods to confirm whether the bolt has reached the pre tightening force: during construction, as long as the plum blossom head falls, it can be considered as qualified, while the large hexagon needs to be confirmed by adjusting the torque of the torque wrench.
其實，在外觀上大六角和普通螺栓是一樣的，這種螺栓現(xiàn)在一般很少用，因為施工起來很不方便，而且容易發(fā)生漏擰的情況，難以確認螺栓是否已經達到設計要求的預緊
In fact, the appearance of the large hexagon bolt is the same as that of the ordinary bolt. This kind of bolt is generally rarely used now, because it is very inconvenient to construct, and it is easy to miss tightening, so it is difficult to confirm whether the bolt has met the pre tightening requirements of the design
