OPERATING INSTRUCTIONS
Page 26 Mega-Trailer
class. 4.8
class. 8.8
class. 10.9
class. 12.9
size lubric.* dry°
lubric.* dry° lubric.* dry°
lubric.* dry°
Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft Nm lb-ft
M 6 4,8 3,5 6 4,5 9 6,5 11 8,5 13 9,5 17 12
15 11,5 19 14,5
M 8 12 8,5 15 11 22 16 28 20
32 24 40 30
37 28 47 35
M10 23 17 29 21 43 32 55 40
63 47 80 60
75 55 95 70
M12 40 29 50 37 75 55 95 70
110 80 140 105 130 95 165 120
M14 63 47 80 60 120 88 150 110 175 130 225 165 205 150 260 190
M16 100 73 125 92 190 140 240 175 275 200 350 255 320 240 400 300
M18 135 100 175 125 260 195 330 250 375 275 475 350 440 325 560 410
M20 190 140 240 180 375 275 475 350 530 400 675 500 625 460 800 580
M22 260 190 330 250 510 375 650 475 725 540 925 675 850 625 1075 800
M24 330 250 425 310 650 475 825 600 925 675 1150 850 1075 800 1350 1000
M27 490 360 625 450 950 700 1200 875 1350 1000 1700 1250 1600 1150 2000 1500
M30 675 490 850 625 1300 950 1650 1200 1850 1350 2300 1700 2150 1600 2700 2000
M33 900 675 1150 850 1750 1300 2200 1650 2500 1850 3150 2350 2900 2150 3700 2750
M36 1150 850 1450 1075 2250 1650 2850 2100 3200 2350 4050 3000 3750 2750 4750 3500
The torque values shown in this chart are guide values and do NOT apply when a different torque is quoted
in this manual for particular screws and nuts. Check that screws and bolts fit tightly regularly. Shear bolts are
designed to shear off at a certain load level. Shear bolts must be replaced with bolts of the same standard. When
replacing nuts and bolts, make sure that replacements are always of the same standard or higher. Torque nuts and
bolts of a higher standard to the same value used for the original parts.
Check that the threads are clean and the bolts correctly inserted. This will prevent damage when they are being
tightened.
Tighten lock nuts (not the screws) with plastic inserts and flared steel lock nuts with approx. 50% of the “dry” value
shown in the chart. Tighten toothed and castellated nuts with the full torque value.
* “lubricated” means that the bolts are lubricated with, for example, engine oil or that phosphate coated or oiled bolts are
being used.
°”Dry” means that normal or galvanised bolts without any lubrication are being used.
11.5 Torque values for metric screws
classification
and marking
of screw
heads
classification
and marking
of nuts
