BA 5230 en 04/2011
Nominal
thread
diameter
Tightening torque
for screw-connection classes
from table 11
Initial-tensioning force
for screw-connection classes
from table 11
Strength
class
of the bolt
E
D
C
E
D
C
d
mm
M
A
Nm
F
M min
.
N
M80x6
8.8
1190000
760000
475000
21500
18500
16500
10.9
1690000
1100000
675000
30500
26400
23400
12.9
1980000
1360000
790000
35700
31400
27400
M90x6
8.8
1510000
968000
605000
30600
26300
23500
10.9
2150000
1380000
860000
43500
37500
33400
12.9
2520000
1600000
1010000
51000
43800
39200
M100x6
8.8
1880000
1200000
750000
42100
36200
32300
10.9
2670000
1710000
1070000
60000
51600
46100
12.9
3130000
2000000
1250000
70000
60400
53900
Damaged bolts must be replaced with new bolts of the same type and strength class.