BOLT TORQUE
BOLT TORQUE SPECIFICATIONS
GENERAL TORQUE SPECIFICATION TABLE
Use the following torques when special torques are not given. These values apply to fasteners as
received from suppliers, dry, or when lubricated with normal engine 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. Remember to always use grade five or better when replacing bolts.
IMPORTANT: On all PLATED GRADE 8 bolts, reduce torque 15% from listed bolt torque specification.
SAE Grade No.
2
5
8*
Bolt head identification
marks as per grade.
NOTE: Manufacturing
Marks Will Vary
TORQUE
TORQUE
TORQUE
Bolt Size
Pounds Feet
Newton-Meters
Pounds Feet
Newton-Meters
Pounds Feet
Newton-Meters
Inches Millimeters Min.
Max. Min. Max. Min.
Max. Min. Max. Min. Max. Min. Max.
1/4 6.35
5
6 7 8 9 11 12 15 12 15 16 20
5/16 7.94
10
12
14
16
17
20.5 23 28 24 29 33 39
3/8 9.53
20
23
27
31
35 42 48 57 45 54 61 73
7/16 11.11
30
35
41
47
54 64 73 87 70 84 95
114
1/2
12.70
45
52 61 70 80 96 109 130 110 132 149 179
9/16 14.29
65
75 88
102
110 132 149 179 160 192 217 260
5/8
15.88
95
105
129
142
150 180 203 244 220 264 298 358
3/4
19.05
150
185
203
251
270 324 366 439 380 456 515 618
7/8
22.23
160
200
217
271
400 480 542 651 600 720 814 976
1
25.40
250
300 339 406 580 696 787
944 900 1080 1220 1464
1-1/8
25.58
- -
-
- 800 880 1085 1193 1280 1440 1736 1953
1-1/4
31.75
- -
-
-
1120 1240 1519 1681 1820 2000 2468 2712
1-3/8
34.93
- -
-
-
1460 1680 1980 2278 2380 2720 3227 3688
1-1/2
38.10
- -
-
-
1940 2200 2631 2983 3160 3560 4285 4827
* Thick Nuts must be used with Grade 8 bolts
METRIC BOLT TORQUE SPECIFICATIONS
Coarse
Thread Fine
Thread
Size of Screw
Grade No.
Ptich (mm)
Pounds Feet
Newton-Meters
Pitch (mm)
Pounds Feet
Newton-Meters
5.6
3.6-5.8
4.9-7.9
-
-
M6 8.8
1.0
5.8-.4
7.9-12.7
-
-
-
10.9
7.2-10
9.8-13.6
-
-
5.6
7.2-14
9.8-19
12-17
16.3-23
M8 8.8
1.25
17-22
23-29.8 1.0 19-27 25.7-36.6
10.9
20-26
27.1-35.2
22-31
29.8-42
5.6
20-25
27.1-33.9
20-29 27.1-39.3
M10 8.8 1.5
34-40
46.1-54.2 1.25
35-47 47.4-63.7
10.9
38-46
51.5-62.3
40-52 54.2-70.5
5.6
28-34
37.9-46.1
31-41
42-55.6
M12 8.8
1.75
51-59
69.1-79.9 1.25
56-68 75.9-92.1
10.9
57-66
77.2-89.4
62-75
84-101.6
5.6
49-56
66.4-75.9
52-64 70.5-86.7
M14 8.8 2.0
81-93
109.8-126 1.5 90-106 122-143.6
10.9
96-109
130.1-147.7
107-124
145-168
5.6
67-77
90.8-104.3
69-83 93.5-112.5
M16 8.8 2.0
116-130
157.2-176.2 1.5
120-138 162.6-187
10.9
129-145
174.8-196.5
140-158
189.7-214.1
5.6
88-100
119.2-136
100-117
136-158.5
M18 8.8 2.0
150-168
203.3-227.6 1.5
177-199 239.8-269.6
10.9
175-194
237.1-262.9
202-231
273.7-313
5.6
108-130
146.3-176.2
132-150
178.9-203.3
M20 8.8 2.5
186-205
252-277.8 1.5 206-242
279.1-327.9
10.9
213-249
288.6-337.4
246-289
333.3-391.6
10360 6-8-95-2
75595
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