Tightening Torques For Standard Bolts And Nuts - Yanmar 3TNV Series Service Manual

13.2 Tightening Torques for Standard Bolts and Nuts

Nominal thread diameter
Item
Hexagon bolt (7T)
and nut
PT plug
Pipe joint bolt
Note) Lubricating oil is not applied to threaded portion and seat surface.
Tightening torque
pitch
M6 1
M8 1.25
M10 1.5
M12 1.75
M14 1.5
M16 1.5
1/8
1/4
3/8
1/2
M8
M10
M12
M14
M16
197
13. Tightening Torque for Bolts and Nuts
Nm(kgf-m)
9.8 11.8 Use 80% of the value at left
(1.0 1.2) when the tightening part is
aluminum.
22.6 28.4
Use 60% of the value at left for
(2.3 2.9)
4T bolts and lock nuts.
44.1 53.9
(4.5 5.5)
78.4 98.0
(8.0 10)
127.5 147.1
(13 15)
215.7 235.4
(22 24)
9.8
(1.0)
19.6
(2.0)
29.4
(3.0)
58.8
(6.0)
12.7 16.7
(1.3 1.7)
19.6 25.4
(2.0 2.6)
24.5 34.3
(2.5 3.5)
39.2 49.0
(4.0 5.0)
49.0 58.8
(5.0 6.0)
Remarks
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