MTU 20V4000M73 series Operating Instructions Manual page 23

Thread
M18
M18 x 1.5
M20
M20 x 1.5
M22
M22 x 1.5
M24
M24 x 1.5
M24 x 2
M27
M27 x 2
M30
M30 x 2
M = tightening torques
A
Tightening torques for studs
Thread
M6
M8
M10
M12
M14
M16
M = tightening torques
A
Tightening torques for setscrews and nuts made of stainless steel
The values in the table are based on a friction coefficient µtot = 0.12, lubricated with Molykote on the thread
and under the screw head.
Basic size
M5
M6
M8
M10
M12
M16
M20
M = tightening torques
A
Hand-tightening
8.8 M (Nm) 10.9 M
A
250 350
280 400
350 500
390 550
480 680
520 730
600 850
680 950
660 900
900 1250
960 1350
1200 1700
1350 1900
Steel M Gray cast iron M
A
(Nm)
9
11
17
27
37
55
Strength class
70
M
A
(Nm)
3.7
6.4
15.3
31
52
126
254
MS150046/03E 2018-08 | General Information | 21
Machine-tightening
(Nm) 8.8 M (Nm)
A A
240
270
330
350
450
490
570
640
620
850
900
1100
1250
screwed into
AI alloy M
A
(Nm)
6
9
13
23
33
45
80
M
A
(Nm)
4.9
8.5
20.4
41
70
167
326
10.9 M (Nm)
A
330
380
475
520
650
700
810
900
850
1175
1275
1600
1800
A
(Nm)
6
10
13
18
33
–
Material
A2 / A4
A2 / A4
A2 / A4
A2 / A4
A2 / A4
A2 / A4
A2 / A4