Tightening Torques For Standard Bolts And Nuts - Takeuchi TB014 Werkstatt-Handbuch

12. Tightening torque for bolts and nuts

12.2 Tightening torques for standard bolts and nuts

Nominal thread diameter
Item
× pitch
Hexagon bolt (7T)
and nut
PT plug
Pipe joint bolt
Note) Lube oil is not applied to threaded portion and seat surface.
Tightening torque
mm
M6 × 1
M8 × 1.25
M10 × 1.5
M12 × 1.75
1/8
1/4
3/8
1/2
M8
M12
M14
M16
N•m (kgf•m)
9.8 to 11.8 Use 80 % of the value at left when
(1.0 to 1.2) the tightening part is aluminum.
Use 60 % of the value at left for
22.5 to 28.4
4T bolts and lock nuts.
(2.3 to 2.9)
44.1 to 54.1
(4.5 to 5.5)
78.3 to 98.3
(8.0 to 10)
9.8
(1.0)
19.6
(2.0)
29.4
(3.0)
58.8
(6.0)
12.7 to 16.7
(1.3 to 1.7)
24.5 to 34.4
(2.5 to 3.5)
39.1 to 49.1
(4.0 to 5.0)
48.9 to 58.9
(5.0 to 6.0)
120
Remarks
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