GENERAL INFORMATION 9
TIGHTENING TORQUE SPECIFICATIONS
The tightening torque values given in the table below are applicable to the bolts unless otherwise
specified.
STANDARD BOLT kg·m (lb.ft/N·m)
An asterisk (*) indicates that the bolts are used for female threaded parts that are made of soft materials
such as casting. Those shown in parentheses in the strength class indicate the classification by the old
standard.
M 6 × 1.0
M 8 × 1.25
M10 × 1.25
M12 × 1.25
M14 × 1.5
M16 × 1.5
M18 × 1.5
M20 × 1.5
M22 × 1.5
M24 × 2.0
*M10 × 1.5
*M12 × 1.5
*M14 × 2.0
*M16 × 2.0
0.4〜0.8
(2.9〜5.8/3.9〜7.8)
0.8〜1.8
(5.8〜13.0/7.8〜17.7)
2.1〜3.5
(15.2〜25.3/20.6〜34.3)
5.0〜7.5
(36.2〜54.2/49.0〜73.6)
7.8〜11.7
(56.4〜84.6/78.5〜114.7)
10.6〜16.0
(76.7〜115.7/103.0〜156.9)
15.4〜23.0
(111.1〜166.4/151.0〜225.6)
21.0〜31.6
(151.9〜228.6/205.9〜307.9)
25.6〜42.2
(185.2〜305.2/251.1〜413.8)
36.6〜55.0
(264.7〜397.8/358.9〜539.4)
2.0〜3.4
(14.5〜24.6/19.6〜32.4)
4.6〜7.0
(33.3〜50.6/45.1〜68.7)
7.3〜10.9
(52.8〜78.8/71.6〜106.9)
10.2〜15.2
(73.8〜110.0/100.0〜149.1)
0.5〜1.0
(3.6〜7.2/4.9〜9.8)
1.2〜2.3
(8.7〜16.6/11.8〜22.6)
2.8〜4.7
(20.3〜34.0/27.5〜46.1)
6.2〜9.3
(44.8〜67.3/60.8〜91.2)
9.5〜14.2
(68.7〜102.7/93.2〜139.3)
13.8〜20.8
(99.8〜150.4/135.3〜204.0)
19.9〜29.9
(143.9〜216.3/195.2〜391.3)
27.5〜41.3
(198.9〜298.7/269.7〜405.0)
37.0〜55.5
(267.6〜401.4/362.9〜544.3)
43.9〜72.5
(317.5〜523.9/430.5〜711.0)
2.8〜4.6
(20.3〜33.3/27.5〜45.1)
5.8〜8.6
(42.0〜62.2/56.9〜84.3)
9.0〜13.4
(65.1〜96.9/88.3〜131.4)
13.2〜19.8
(95.5〜143.2/129.5〜194.2)
1.7〜3.1
(12.3〜22.4/16.7〜30.4)
3.8〜6.4
(27.5〜46.3/37.3〜62.8)
7.7〜11.6
(55.7〜83.9/75.5〜113.8)
11.6〜17.4
(83.9〜125.6/113.8〜170.6)
16.3〜24.5
(118.9〜177.2/159.9〜240.3)
23.4〜35.2
(169.3〜254.6/229.5〜345.2)
32.3〜48.5
(233.6〜350.8/316.8〜475.6)
43.3〜64.9
(313.2〜469.4/424.6〜636.5)
56.5〜84.7
(408.7〜612.6/554.1〜830.6)
3.7〜6.1
(26.8〜44.1/36.3〜59.8)
7.3〜10.9
(52.8〜78.8/71.6〜106.9)
10.9〜16.3
(78.8〜118.9/106.9〜159.9)
15.6〜23.4
(112.8〜169.3/162.8〜229.5)
Refined
No mark
Non-Refined
4.8 (4T)
8.8(7T)
9.8 (9T)
Strength
Class
Bolt
Identification
Bolt
Diameter ×
pitch (mm)
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