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USE THE FOLLOWING TORQUES WHEN SPECIAL TORQUES ARE NOT GIVEN
NOTE: These values apply to fasteners as received from supplier, dry or when lubricated with normal oil. They do not apply if
special graphited or moly disulphide greases or other extreme pressure lubricants are used. This applies to both UNF and UNC
threads.
SEE Grade No.
BOLT HEAD
IDENTIFICATION
MARKS AS PER GRADE
NOTE MANUFACTURING
MARKS WILL VARY
BOLT SIZE
POUNDS FEET
Inches
Millimetre
Min.
1/4"
6.35
5
5/16"
7.94
10
3/8"
9.53
20
7/16"
11.11
30
1/2"
12.7
45
9/16"
14.29
65
5/8"
15.88
95
3/4"
19.05
150
7/8"
22.23
160
1"
25.4
250
*Thick nuts must be used with grade 8 bolts
Size Screw
Grade No. Pitch
M6
4T
7T
8T
M8
4T
7T
8T
M10
4T
7T
8T
M12
4T
7T
8T
M14
4T
7T
8T
M16
4T
7T
8T
M18
4T
7T
8T
M20
4T
7T
8T
TORQUE SPECIFICATION TABLE
GENERAL TORQUE SPECIFICATION TABLE
2
TORQUE
NEWTON-METERS
Max.
Min.
Max.
6
6.8
8.13
12
13.6
16.3
23
27.1
31.2
35
40.7
47.4
52
61
70.5
75
88.1
101.6
105
128.7
142.3
185
203.3
250.7
200
216.8
271
300
338.8
406.5
METRIC BOLT TORQUE SPECIFICATIONS
COARSE THREAD
Pounds Feet
(mm)
1.00
3.6 -
5.8
5.8 -
9.4
7.2 -
10
1.25
7.2 -
14
17
-
22
20
-
26
1.50
20
-
25
34
-
40
38
-
46
1.75
28
-
34
51
-
59
57
-
66
2.00
49
-
56
81
-
93
96
- 109
2.00
67
-
77
116
- 130
129
- 145
2.00
88
- 100
150
- 168
175
- 194
2.50
108
- 130
186
- 205
213
- 249
5
TORQUE
POUNDS FEET
NEWTON-METERS
Min.
Max.
Min.
9
11
12.2
17
20.5
23.1
35
42
47.5
54
64
73.2
80
96
108.5
110
132
149.2
150
180
203.4
270
324
366.1
400
480
542.4
580
696
786.5
Newton-Meters
Pitch
(mm)
4.9 -
7.9
-
7.9 -
12.7
9.8 -
13.6
9.8 -
19
1.00
23
-
29.8
27.1 -
35.2
27.1 -
33.9
1.25
46.1 -
54.2
51.5 -
62.3
37.9 -
46.1
1.25
69.1 -
79.9
77.2 -
89.4
66.4 -
75.9
1.50
109.8 -
126
130.1 -
147.7
90.8 -
104.3
1.50
157.2 -
176.2
174.8 -
196.5
119.2 -
136
1.50
203.3 -
227.6
237.1 -
262.9
146.3 -
176.2
1.50
252
-
277.8
288.6 -
337.4
20
8 *
TORQUE
POUNDS FEET
Max.
Min. Max.
Max.
14.9
12
15
27.8
24
29
57
45
54
86.8
70
84
130.2
110
132
179
160
192
244.1
220
264
439.3
380
456
650.9
600
720
943.8
900
1080
FINE THREAD
Pounds Feet
Newton-Meters
-
-
-
12
-
17
19
-
27
22
-
31
20
-
29
35
-
47
40
-
52
31
-
41
56
-
68
62
-
75
52
-
64
90
-
106
122
107
-
124
145
69
-
83
120
-
138
162.6
140
-
158
189.7
100
-
117
136
177
-
199
239.8
202
-
231
273.7
132
-
150
178.9
206
-
242
279.1
246
-
289
333.3
NEWTON-METERS
Min. Max.
Max.
16.3
30.3
32.5
39.3
61
73.2
94.9
113.9
149.2
179
217
260.4
298.3
358
515.3
618.3
813.6
976.3
1220.4
1464.5
-
-
-
16.3
-
23
25.7
-
36.6
29.8
-
42
27.1
-
39.3
47.4
-
63.7
54.2
-
70.5
42
-
55.6
75.9
-
92.1
84
-
101.6
70.5
-
86.7
-
143.6
-
168
93.5
-
112.5
-
187
-
214.1
-
158.5
-
269.6
-
313
-
203.3
-
327.9
-
391.6
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Table des Matières
