國標扭剪型bai高強螺栓為M16、M20、M22、M24四種，現(xiàn)du在也有非國標的M27、zhiM30兩種。dao
There are four kinds of national standard torsion shear type Bai high-strength bolts: M16, M20, M22 and M24. At present, there are also non-national standard M27 and zhim30. Dao
國標大六角高強螺栓為M16、M20、M22、M24、M27、M30等幾種。
The national standard large hexagon high strength bolts are M16, M20, M22, M24, M27, M30, etc.
具體選用級別要看使用者的要求，比如一個汽車制造商對扭矩扳手的要求是M16級，那M20級拿過去，就會認定為不合格。
The specific selection level depends on the user's requirements. For example, an automobile manufacturer's requirement for a torque wrench is M16. If the M20 level is taken, it will be deemed as unqualified.
手動力矩扳手可分為：預置式、定值式、表盤式、數(shù)顯式、打滑式、折彎式、以及公斤扳手。當螺釘和螺栓的緊密度關重要的情況下，使用扭矩扳手可以允許操作員施加特定扭矩值。
Manual torque wrench can be divided into: preset type, fixed value type, dial type, digital display type, sliding type, bending type, and kg wrench. When the tightness of screws and bolts is critical, the use of a torque wrench allows the operator to apply specific torque values.
