Valid from serial number T-code
713962- 403-414, 669-671, 716-718
Order number Date
218920-040 2005-09-09
© BT Europe AB Service Manual REFLEX RR B,E RR B,E CC 3- 5
Technical data – M4
General tightening torque
3.1 General tightening torque
Millimetre threads.
The following applies under ideal conditions, e.g. steel against steel.
3.1.1 Galvanised, non-oiled bolts
A=Strength class
3.1.2 Untreated, oiled bolts
A=Strength class
NOTE!
Experience has shown that if you adjust the torque wrench to the val-
ues for untreated bolts, you will achieve the correct torque value for
galvanised bolts.
Do not tighten more than the values set out in the table otherwise the
bolts may be destroyed
Table 2: General tightening torque in Newton metres NM
Thread A M3 M4 M5 M6 M8 M10
Tightening torque 8.8 1.15 2.8 5.5 9.5 23.0 45
Tightening torque 12.9 2.0 4.7 9.3 16.3 38.5 75.8
Thread A M12 M14 M16 M20 M24
Tightening torque 8.8 77.7 123 189 369.6 638.5
Tightening torque 12.9 130.5 208 319.7 623 1075
Table 3: General tightening torque in Newton metres NM
Thread A M3 M4 M5 M6 M8 M10
Tightening torque 8.8 1.2 2.9 5.7 9.8 24.0 47
Tightening torque 12.9 2.1 4.9 9.7 17.0 40.0 79.0
Thread A M12 M14 M16 M20 M24
Tightening torque f 8.8 81 128 197 385 665
Tightening torque 12.9 136 217 333 649 1120
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