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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.
Size of Screw
Property Class
Course Thread
Fine Thread
Pitch (mm)
Pounds Feet
Newton-Meters
Pitch (mm)
Pounds Feet
Newton-Meters
M6
5.6
1.0
3.6-5.8 4.9-7.9
-
- -
8.8
5.8-9.4 7.9-12.7
-
-
10.9 7.2-10
9.8-13.6 -
-
M8
5.6
1.25
7.2-14 9.8-19
1.0
12-17 16.3-23
8.8
17-22 23-29.8
19-27 25.7-36.6
10.9
20-26 27.1-35.2
22-31 29.8-42
M10
5.6
1.5
20-25 27.1-33.9
1.25
20-29 27.1-39.3
8.8
34-40 46.1-54.2
35-47 47.4-63.7
10.9 38-46
51.5-62.3
40-52
54.2-70.5
M12
5.6
1.75
28-34 37.9-46.1
1.25
31-41 42-55.6
8.8
51-59 69.1-79.9
55-68 75.9-92.1
10.9 57-66
77.2-89.4
62-75
84-101.6
M14
5.6
2.0
49-56 66.4-75.9
1.5
52-64 70.5-86.7
8.8
81-93 109.8-126
90-106 122-143.6
10.9 96-109
130.1-147.7
107-124
145-168
M16
5.6
2.0
67-77 90.8-104.3
1.5
69-83 93.6-112.5
8.8
116-130 157.2-176.2
120-138 162.6-187
10.9 129-145
174.8-196.5
140-158
189.7-214.1
M18
5.6
2.0
88-100 119.2-136
1.5
100-117 136-158.5
8.8
150-168 203.3-227.6
177-199 239.8-269.6
10.9
175-194 237.1-262.9
202-231 273.7-313
M20
5.6
2.5
108-130 146.3-176.2
1.5
132-150 178.9-203.3
8.8
186-205 252-277.8
206-242 279.1-327.9
10.9 213-249
288.6-337.4
246-289
333.3-391.6
SAE Grade No.
Bolt head identification
mark 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
5.6 8.8
10.9
5
8*
2