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BA 9142 en 02/2015
Nominal
diameter of
the thread
Tightening torque for screw
connection classes from Table 7
Initial stressing force for screw
connection classes from Table 7
Strength
class of the
bolt
EDCEDC
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
Note
Damaged bolts must be replaced with new bolts of the same type and strength class.