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TORQUE CHART
Thread UNC and UNF
Bolt size
Inches
mm
1/4
6.35
5/16
7.94
3/8
9.53
7/16
11.11
1/2
12.70
9/16
14.29
5/8
15.88
3/4
19.05
7/8
22.23
1
25.40
1 1/8
25.58
1 1/4
31.75
1 3/8
34.93
1 1/2
38.10
* Thick nuts must be used with grade 8 bolts.
M6
UNC
1.00
M8
UNC
1.25
M10
UNC
1.5
M12
UNC
1.75
M14
UNC
2.0
M16
UNC
2.0
M18
UNC
2.0
M20
UNC
2.5
M8
UNF
1.0
M10
UNF
1.25
M12
UNF
1.25
M14
UNF
1.5
M16
UNF
1.5
M18
UNF
1.5
M20
UNF
1.5
Use the above torques when special torque is not given.
NOTE: These values apply to fasteners as received from supplier, dry, or when lubricated with normal engine oil. They do
not apply if extreme pressure lubricants are used.
TORQUE SPECIFICATION TABLE
Grade 2
Torque
Pound feet
Newton meters
min.
max.
min.
5
6
6.8
10
12
13.6
20
23
27.1
30
35
40.7
45
52
61.0
65
75
88.1
95
105
128.7
150
185
203.3
160
200
216.8
250
300
338.8
-
-
-
-
-
-
-
-
-
-
-
-
Grade 4T
Torque
Pound feet
Newton meters
min.
max.
min.
3.6
5.8
4.9
7.2
14
9.8
20
25
27.1
28
34
37.9
49
56
66.4
67
77
90.8
88
100
119.2
108
130
146.3
12
17
16.3
20
29
27.1
31
41
42
52
64
70.5
69
83
93.5
100
117
136
132
150
178.9
Grade 5
Torque
Pound feet
Newton meters
max.
min.
max.
8.13
9
11
16.3
17
20.5
31.2
35
42
47.4
54
64
70.5
80
96
108.5
101.6
110
132
149.2
142.3
150
180
203.4
250.7
270
324
366.1
271.0
400
480
542.4
406.5
580
696
786.5
-
800
880 1084.8 1193.3
-
1120
1240 1518.7 1681.4
-
1460
1680 1979.8 2278.1
-
1940
2200 2630.6 2983.2
Grade 7T
Torque
Pound feet
Newton meters
max.
min.
max.
7.9
5.8
9.4
19
17
22
33.9
34
40
46.1
51
59
75.9
81
93
109.8
104.3
116
130
157.2
136
150
168
203.3
176.2
186
205
23
19
27
39.3
35
47
55.6
56
68
86.7
90
106
112.5
120
138
162.6
158.5
177
199
239.8
203.3
206
242
279.1
- 28 -
Grade 8*
Pound feet
min.
max.
min.
max.
12.2
14.9
12
23.1
27.8
24
47.5
57.0
45
73.2
86.8
70
130.2
110
179.0
160
244.1
220
439.3
380
650.9
600
943.8
900
1080 1220.4 1464.5
1280
1440 1735.7 1952.6
1820
2000 2467.9 2712.0
2380
2720 3227.3 3688.3
3160
3560 4285.0 4827.4
Grade 8T
Pound feet
min.
max.
min.
max.
7.9
12.7
7.2
23
29.8
20
46.1
54.2
38
69.1
79.9
57
126
96
176.2
129
227.6
175
252
277.8
213
25.7
36.6
22
47.4
63.7
40
75.9
92.1
62
122
143.6
107
187
140
269.6
202
327.9
246
Torque
Newton meters
min.
max.
15
16.3
30.3
29
32.5
39.3
54
61.0
73.2
84
94.9
113.9
132
149.2
179.0
192
217.0
260.4
264
298.3
358.0
456
515.3
618.3
720
813.6
976.3
Torque
Newton meters
min.
max.
10
9.8
13.6
26
27.1
35.2
46
51.5
62.3
66
77.2
89.4
109
130.1
147.7
145
174.8
196.5
194
237.1
262.9
249
288.6
337.4
31
29.8
42
52
54.2
70.5
75
84
101.6
124
145
168
158
189.7
214.1
231
273.7
313
289
333.3
391.6
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