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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.
•
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 metric units added in brackets { }. Values in
engine specifications, performance curves, and other items taken from official approval documents are given only
in metric units.
*SI: Le Système International d’Unités
Item SI unit {metric unit} Conversion factor
Force N {kgf} 9.80665 N {1 kgf}
Moment of force N·m {kgf·m} 9.80665 N·m {1 kgf·m}
Pressure
Positive pressure kPa {kgf/cm
2
} 98.0665 kPa {1 kgf/cm
2
}
Vacuum pressure
kPa {mmHg} 0.133322 kPa {1 mmHg}
Pa {mmH
2
O} 9.80665 Pa {1 mmH
2
O}
Volume dm
3
{L} 1 dm
3
{1 L}
Heat quantity J {kcal} 4186.05 J {1 kcal}
Heat flow W {kcal/h} 1.16279 W {1 kcal/h}
Power kW {PS} 0.7355 kW {1 PS}
Angle ˚ –
Temperature ˚C –
Electric current A –
Voltage V –
Resistance
Ω
–
Electric power W –
Unit SI unit Foot-pound unit Conversion rate
Force
N (Newton)
lbf 1 N = 0.2248 lbf
Moment of force
N·m
lbf.ft 1 N·m = 0.7375 lbf.ft
Pressure
kPa (kilopascal)
lbf/in.
2
1 kPa = 0.145 lbf/in.
2
1 kPa = 0.2953 in. Hg
Volume
L
cm
3
cm
3
gal.
oz
cu.in.
1 L = 0.2642 gal. (U.S.)
1 L = 0.220 gal. (Imp.)
1 cm
3
= 0.033814 oz (U.S.)
1 cm
3
= 0.035195 oz (Imp.)
1 cm
3
= 0.061023 cu.in.
Power
kW (kilowatt)
HP 1 kW = 1.34 HP
Temperature
˚C
˚F t˚C = (1.8t˚C + 32)˚F
Mass quantity of
matter
kg
g
lb
oz
1 kg = 2.2046 lb
1 g = 0.035274 oz
Dimension
m
mm
ft.
in.
1 m = 3.2808 ft.
1 mm = 0.03937 in.
Stress
N/cm
2
lbf/in.
2
1 N/cm
2
= 1.45 lbf/in.
2
Example: 390 N·m {40 kgf·m}
Metric unit
SI unit