10-48 SERVICING INFORMATION
TIGHTENING TORQUE CHART
Each fastener should be tightened to the torque specified in “TIGHTENING LIST”. If no description or speci-
fication is provided, refer to the following tightening torque chart for the applicable torque for each fastener.
*1: Small crown shape bolt (crown shape bolt with flange either “A = 5 & B = 7” or “A = 6 & B = 8”)
Strength Unit
Thread diameter (Nominal diameter) A [mm]
4 5 6 8 10 12 14 16 18
A equivalent of 4T strength
fastener without flange
N·m 1.5 3.0 5.5 13 29 45 65 105 160
kgf-m 0.15 0.3 0.55 1.3 2.9 4.5 6.5 10.5 16.0
lbf-ft 1.0 2.0 4.0 9.5 21.0 32.5 47.0 76.0 115.5
A equivalent of 4T strength
fastener with flange
N·m 1.7 3.3 6 14 32 50 72 116 176
kgf-m 0.17 0.33 0.6 1.4 3.2 5.0 7.2 11.6 17.6
lbf-ft 1.0 2.5 4.5 10.0 23.0 36.0 52.0 84.0 127.5
A equivalent of 7T strength
fastener without flange
and small crown shape bolt *1
N·m 2.3 4.5 10 23 50 85 135 210 240
kgf-m 0.23 0.45 1.0 2.3 5.0 8.5 13.5 21.0 24.0
lbf-ft 1.5 3.5 7.0 16.5 36.0 61.5 97.5 152.0 173.5
A equivalent of 7T strength
fastener with flange
except small crown shape bolt
N·m2.55 11255594149231264
kgf-m 0.25 0.5 1.1 2.5 5.5 9.4 14.9 23.1 26.4
lbf-ft 2.0 3.5 8.0 18.0 40.0 68.0 107.5 167.0 191.0
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