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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 W ILL VARY
BOLT SIZE
FOOT POUNDS
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
Size Screw
Grade No.
4T
M6
7T
8T
4T
M8
7T
8T
M10
4T
7T
8T
4T
M12
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
NEW TON-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
Pitch
Foot Pounds
(mm )
3.6 -
5.8
1.00
5.8 -
9.4
7.2 -
10
7.2 -
14
1.25
17
-
22
20
-
26
1.50
20
-
25
34
-
40
38
-
46
28
-
34
1.75
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
*
Thick nuts must be used with grade 8 bolts
5
TORQUE
FOOT POUNDS
NEW TON-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
130.2
110
132
149.2
150
180
203.4
244.1
270
324
366.1
439.3
400
480
542.4
650.9
580
696
786.5
943.8
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
17
8 *
TORQUE
FOOT POUNDS
NEW TON-METERS
Max.
Min. Max.
Max.
Min. Max.
14.9
12
15
16.3
27.8
24
29
32.5
57
45
54
86.8
70
84
94.9
110
132
149.2
179
160
192
220
264
298.3
380
456
515.3
600
720
813.6
900
1080
1220.4
FINE THREAD
Foot Pounds
Newton-Meters
-
-
-
12
-
17
16.3 -
19
-
27
25.7 -
22
-
31
29.8 -
20
-
29
27.1 -
35
-
47
47.4 -
40
-
52
54.2 -
31
-
41
42
56
-
68
75.9 -
62
-
75
84
52
-
64
70.5 -
90
-
106
122
107
-
124
145
69
-
83
93.5 -
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 -
Max.
30.3
39.3
61
73.2
113.9
179
217
260.4
358
618.3
976.3
1464.5
-
-
-
23
36.6
42
39.3
63.7
70.5
-
55.6
92.1
-
101.6
86.7
-
143.6
-
168
112.5
187
214.1
-
158.5
269.6
313
203.3
327.9
391.6
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Table des Matières
