2-17
TIGHTENING TORQUES
GENERAL TORQUE
SPECIFICATIONS
This chart specifies torque for stan-
dard fasteners with standard I.S.O.
pitch threads. Torque specifications
for special components or assem-
blies are included in the applicable
sections of this book. To avoid
warpage, tighten multi-fastener as-
semblies in a crisscross fashion, in
progressive stages, until full torque is
reached. Unless otherwise specified,
torque specifications call for clean,
dry threads. Components should be
at room temperature.
A. Distance between flats
B. Outside thread diameter
DEFINITION OF UNITS
A
(Nut)
B
(Bolt
)
TORQUE SPECIFI-
CATION
Nm m•kg ft•lb
10
mm
6 mm 6 0.6 4.3
12
mm
8 mm 15 1.5 11
14
mm
10
mm
30 3.0 22
17
mm
12
mm
55 5.5 40
19
mm
14
mm
85 8.5 61
22
mm
16
mm
130 13 94
Unit Read Definition Measure
mm
millimeter 10
-3
meter Length
cm
centimeter 10
-2
meter Length
kg
kilogram 10
3
gram Weight
N
Newton 1 kg × m/sec
2
Force
Nm
Newton meter N × m Torque
m•kg
Meter kilogram m × kg Torque
Pa
Pascal N/m
2
Pressure
N/mm
Newton per millimeter N/mm Spring rate
L
Liter — Volume or capacity
cm
3
Cubic centimeter — Volume or capacity
r/min
Revolution per minute — Engine speed
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