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Metric Bolts - Tightening Torques

Typical maximum recommended thightening torques for metric bolts

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Maximum tightening torque for coarce threaded metric steel bolts:

Size
(mm)
Typical Maximum Tightening Torque (Nm)
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Property Class
Grade 8.8Grade 9.8Grade 10.9Grade 12.9
M5 7.0 7.8 10.0 11.7
M6 11.8 13.3 17.0 19.9
M8 28.8 32.3 41.3 48.3
M10 57.3 64.1 81.8 95.7
M12 99.8 112 143 167
M16 248 277 354 413
M20 500 690 809
M24 865 1195 1395
M30 1719 2377 2774

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Unit Converters

Temperature

oC
oF


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Length

m
km
in
ft
yards
miles
naut miles


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Area

m2
km2
in2
ft2
miles2
acres


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Volume

m3
liters
in3
ft3
us gal


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Weight

kgf
N
lbf


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Velocity

m/s
km/h
ft/min
ft/s
mph
knots


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Pressure

Pa (N/m2)
bar
mm H2O
kg/cm2
psi
inches H2O


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Flow

m3/s
m3/h
US gpm
cfm


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