PRONAR T680, Operator'S Manual, Page: 136 / 147

Pronar T680 SECTION 5
5.38
5.10 TIGHTENING TORQUE FOR NUT AND BOLT
CONNECTIONS
Unless other tightening parameters are given, during maintenance repair work apply
appropriate torque to tighten nut and bolt connections. Recommended tightening torque for
the most frequently used nut and bolt connections are given in table below. Given values
apply to non-lubricated steel bolts.
TABLE 5.7 Tightening torque for nut and bolt connections
5.8
(1)
8.8
(1)
10.9
(1)
THREAD
METRIC
Md [Nm]
M10 37 49 72
M12 64 85 125
M14 100 135 200
M16 160 210 310
M20 300 425 610
M24 530 730 1 050
M27 820 1 150 1 650
M30 1 050 1 450 2 100
(1)
– strength class according to DIN ISO 898 standard