00
00-5
Tightening torque
• Values are directly specified for out-of-standard tightening torques for bolts and nuts.
• Where there is no specified figure for tightening torque, follow the table covering standard tightening torques.
(Values for standard tightening torques are based on thread size and material.)
• When the item is to be tightened in a wet state, “wet” is indicated. Where there is no indication, read it as dry.
Units
• Tightening torques and other parameters are given in SI* units with imperial unit and metric units added in brack-
ets { }.
*SI: Le Système International d’Unités
Unit SI unit {imperial unit, metric unit} Conversion factor
Force N {lbs, kgf} 9.80665 N {2.2046 lbs, 1 kgf}
Moment of force N·m {ft.lbs, kgf·m} 9.80665 N·m {7.2329 ft.lbs, 1 kgf·m}
Pressure
Positive pressure kPa {psi, kgf/cm
2
} 98.0665 kPa {14.22 psi, 1 kgf/cm
2
}
Vacuum pressure kPa {in.Hg, mmHg} 0.133322 kPa {0.03937 in.Hg, 1 mmHg}
Volume J {BTU, kcal} 4186.05 J {3.96825BTU, 1 kcal}
Heat quantity W {BTU/h, kcal/h} 1.16279W {3.96825BTU/h, 1 kcal/h}
Unit SI unit {imperial unit} Conversion factor
Length
mm {in.} 1 mm {0.03937 in.}
m {ft.} 1 m {3.2808 ft.}
km {mile} 1 km {0.6214 mile}
Mass
kg {lb} 1 kg {2.2046 lb}
g {oz} 1 g {0.035274 oz}
Temperature
(in degree Celsius)
°C {°F} 1°C {(1°C × 1.8 + 32)°F}
Velocity
km/h {mph} 1 km/h {0.6214 mph}
m/s {ft/s} 1 m/s {3.281 ft/s}
Volume
L {qts}, L {gal} 1 L {1.05336 qts}, 1 L {0.2642 gal}
cm
3
{cu.in.} 1 cm
3
{0.061023 cu.in.}
Area m
2
{in
2
}, m
2
{ft
2
}1 m
2
{1.550 × 10
3
in
2
}, 1 m
2
{1.076 × 10 ft
2
}
Example: 390 N·m {290 ft.lbs, 40 kgf·m}
Metric unit
SI unit
Imperial unit
Example: 30 mm {1.18 in.}
SI unit
Imperial unit