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1.4
The values specified in the table apply for screws:
1.4
Tightening torques
black oiled
l
with surface protection A4C
l
with surface protection DACROMET
l
i
Note
DACROMET is a surface protection that mainly consists of zinc and aluminium in a chromium oxide matrix. DAC-
ROMETIZATION provides excellent corrosion protection for metal surfaces by applying a mineral coating with
metallic-silver appearance.
Tightening torques for screws with metric unified thread
Screw dimension
M4
M5
M6
M8
M10
M12
M14
M16
M18
M20
M22
M24
M27
M30
*
Coefficient of friction
tot. = 0,14
Tightening torques for screws with metric unified fine thread
Screw dimension
M8 x 1
M10 x 1.25
M12 x 1,25
M12 x 1.5
M14 x 1.5
M16 x 1.5
M18 x 1.5
M20 x 1.5
M22 x 1.5
M24 x 2
M27 x2
M30 x 2
*
Coefficient of friction
tot. = 0,14
28
*
Tightening torques Nm
8.8
3
6
10
25
50
88
137
211
290
412
560
711
1050
1420
*
Tightening torques Nm
8.8
26
52
98
93
152
225
324
461
618
780
1147
1568
BOMAG
Tightening torques
10.9
5
9
15
35
75
123
196
300
412
578
785
1000
1480
2010
10.9
37
76
137
127
216
318
466
628
863
1098
1578
2254
12.9
5
10
18
45
83
147
235
358
490
696
942
1200
1774
2400
12.9
48
88
126
152
255
383
554
775
1058
1294
1920
2695
008 922 89
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