As for tightening torque which are standardized, including bolts, nuts and fittings, the following are basic ones.
1) Torque standard for bolts and nuts
(1) Coarse thread
|
Bolt size |
8.8T |
10.9T |
12.9T |
|||
|
kgf·m |
lbf·ft |
kgf·m |
lbf·ft |
kgf·m |
lbf·ft |
|
|
M6 ×1.0 |
0.8 ~ 1.2 |
5.8 ~ 8.6 |
1.2 ~ 1.8 |
8.7 ~ 13.0 |
1.5 ~ 2.1 |
10.9 ~ 15.1 |
|
M8 ×1.25 |
2.0 ~ 3.0 |
14.5 ~ 21.6 |
2.8 ~ 4.2 |
20.3 ~ 30.4 |
3.4 ~ 5.0 |
24.6 ~ 36.1 |
|
M10×1.5 |
4.0 ~ 6.0 |
29.0 ~ 43.3 |
5.6 ~ 8.4 |
40.5 ~ 60.8 |
6.8 ~ 10.0 |
49.2 ~ 72.3 |
|
M12×1.75 |
6.8 ~ 10.2 |
50.0 ~ 73.7 |
9.6 ~ 14.4 |
69.5 ~ 104 |
12.3 ~ 16.5 |
89.0 ~ 119 |
|
M14×2.0 |
10.9 ~ 16.3 |
78.9 ~ 117 |
16.3 ~ 21.9 |
118 ~ 158 |
19.5 ~ 26.3 |
141 ~ 190 |
|
M16×2.0 |
17.9 ~ 24.1 |
130 ~ 174 |
25.1 ~ 33.9 |
182 ~ 245 |
30.2 ~ 40.8 |
141 ~ 295 |
|
M18×2.5 |
24.8 ~ 33.4 |
180 ~ 241 |
34.8 ~ 47.0 |
252 ~ 340 |
41.8 ~ 56.4 |
302 ~ 407 |
|
M20×2.5 |
34.9 ~ 47.1 |
253 ~ 340 |
49.1 ~ 66.3 |
355 ~ 479 |
58.9 ~ 79.5 |
426 ~ 575 |
|
M22×2.5 |
46.8 ~ 63.2 |
339 ~ 457 |
65.8 ~ 88.8 |
476 ~ 642 |
78.9 ~ 106 |
570 ~ 766 |
|
M24×3.0 |
60.2 ~ 81.4 |
436 ~ 588 |
84.6 ~ 114 |
612 ~ 824 |
102 ~ 137 |
738 ~ 991 |
|
M30×3.5 |
120 ~ 161 |
868 ~ 1164 |
168 ~ 227 |
1216 ~ 1641 |
202 ~ 272 |
1461 ~ 1967 |
(2) Fine thread
|
Bolt size |
8.8T |
10.9T |
12.9T |
|||
|
kgf·m |
lbf·ft |
kgf·m |
lbf·ft |
kgf·m |
lbf·ft |
|
|
M8 ×1.0 |
2.1 ~ 3.1 |
15.2 ~ 22.4 |
3.0 ~ 4.4 |
21.7 ~ 31.8 |
3.6 ~ 5.4 |
26.1 ~ 39.0 |
|
M10×1.25 |
4.2 ~ 6.2 |
30.4 ~ 44.9 |
5.9 ~ 8.7 |
42.7 ~ 62.9 |
7.0 ~ 10.4 |
50.1 ~ 75.2 |
|
M12×1.25 |
7.3 ~ 10.9 |
52.8 ~ 78.8 |
10.3 ~ 15.3 |
74.5 ~ 110 |
13.1 ~ 17.7 |
94.8 ~ 128 |
|
M14×1.5 |
12.4 ~ 16.6 |
89.7 ~ 120 |
17.4 ~ 23.4 |
126 ~ 169 |
20.8 ~ 28.0 |
151 ~ 202 |
|
M16×1.5 |
18.7 ~ 25.3 |
136 ~ 182 |
26.3 ~ 35.5 |
191 ~ 256 |
31.6 ~ 42.6 |
229 ~ 308 |
|
M18×1.5 |
27.1 ~ 36.5 |
196 ~ 264 |
38.0 ~ 51.4 |
275 ~ 371 |
45.7 ~ 61.7 |
331 ~ 446 |
|
M20×1.5 |
37.7 ~ 50.9 |
273 ~ 368 |
53.1 ~ 71.7 |
384 ~ 518 |
63.6 ~ 86.0 |
460 ~ 622 |
|
M22×1.5 |
51.2 ~ 69.2 |
370 ~ 500 |
72.0 ~ 97.2 |
521 ~ 703 |
86.4 ~ 116 |
625 ~ 839 |
|
M24×2.0 |
64.1 ~ 86.5 |
464 ~ 625 |
90.1 ~ 121 |
652 ~ 875 |
108 ~ 146 |
782 ~ 1056 |
|
M30×2.0 |
129 ~ 174 |
933 ~ 1258 |
181 ~ 245 |
1310 ~ 1772 |
217 ~ 294 |
1570 ~ 2126 |
2) Torque standard for bolts of split flange (1) Coarse thread, 10T
|
Bolt spec |
kgf·m |
lbf·ft |
|
M10×1.5 |
5.5~8.3 |
39.8~60 |
|
M12×1.75 |
9.8~15.8 |
70.9~114 |
|
M16×2.0 |
25.2~34.2 |
182~247 |
(2) Fine thread, 10T
|
Bolt spec |
kgf·m |
lbf·ft |
|
M10×1.25 |
5.9~8.9 |
42.7~64.4 |
|
M12×1.25 |
10.6~16.0 |
76.7~116 |
|
M16×1.5 |
26.6~36.0 |
192~260 |
3) Torque standard for pipe and hose
|
Pipe and hose |
Tool, spanner (mm) |
kgf·m |
lbf·ft |
|
1/4" |
19 |
4 |
28.9 |
|
3/8" |
22 |
5 |
36.2 |
|
1/2" |
27 |
9.5 |
68.7 |
|
3/4" |
36 |
18 |
130 |
|
1" |
41 |
21 |
152 |
|
1-1/4" |
50 |
35 |
253 |
4) Torque standard for pipe and hose (ORFS type)
|
Pipe and hose |
Tool, spanner (mm) |
kgf·m |
lbf·ft |
|
9/16-18" |
19 |
4 |
28.9 |
|
11/16-16" |
22 |
5 |
36.2 |
|
13/16-16" |
24 |
9.5 |
68.7 |
|
1-3/16-12" |
36 |
18 |
130 |
|
1/7/16-12" |
41 |
21 |
152 |
|
1-11/16-12" |
50 |
35 |
253 |
5) Torque standard for fitting
|
Fitting spec |
Tool, spanner (mm) |
kgf·m |
lbf·ft |
|
1/4" |
19 |
4 |
28.9 |
|
3/8" |
22 |
5 |
36.2 |
|
1/2" |
27 |
9.5 |
68.7 |
|
3/4" |
36 |
18 |
130 |
|
1" |
41 |
21 |
152 |
|
1-1/4" |
50 |
35 |
253 |