Standard Screw Tightening Torques
 CAUTION |
|---|
|
HAZARD OF INAPPROPRIATE ASSEMBLY
Failure to follow these instructions can result in injury or equipment damage.
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NOTE: It is recommended to utilize these torque values for the installations
that are covered in this guide.
Recommended Tightening Torques for General Screw Connections
|
Grade or material |
|||
|---|---|---|---|
|
Screw or bolt |
Plastics [N•m] |
≥8.8 ≤10.9 |
Self-locking screw ≤8.8 |
|
Thread Ø |
Tightening torque [N•m] |
||
|
M4 |
0.25 |
2.6 |
– |
|
M5 |
0.5 |
5.0 |
7.0 |
|
M6 |
0.8 |
8.8 |
12.3 |
|
M8 |
1.8 |
21.0 |
30.0 |
|
M10 |
3.5 |
42.0 |
59.0 |
|
M12 |
6.0 |
70.0 |
97 |
|
M16 |
12 |
170 |
– |
Screw Fastening for Power Transmission
Screws
and bolts: Grade ≥ 8.8
|
Conductor material: |
Copper |
Aluminum |
|---|---|---|
|
Thread Ø |
Tightening torques [N•m] |
Tightening torques [N•m] |
|
M6 |
6.5 |
5.5 |
|
M8 |
17 |
12 |
|
M10 |
35 |
23.5 |
|
M12 |
68 |
48 |
|
M16 |
135 |
94 |
|
M20 |
200 |
140 |
Screw Connection for Terminal Strips
| Thread Ø | Tightening torques [N•m] |
|---|---|
| M2.5 (M2.6) | 0.5 |
| M3 | 0.7 |
| M3.5 | 1.0 |
| M4 | 1.5 |
| M5 | 2.5 |