168
M4 M5 M6 M7 M8 M10 M12 M14 M16 M18 M20 M22 M24 M27
ft.-lbs. 1.5 3 5.2 8.2 13.5 24 43.5 70.5 108 142 195 276 353 530
N·m 2 4 7 11 18 32 58 94 144 190 260 368 470 707
ft.-lbs. 2.2 4.5 7.5 12 18.8 35.2 62.2 100 147 202 275 390 498 747
N·m 3 6 10 16 25 47 83 133 196 269 366 520 664 996
ft.-lbs. 2.7 5.2 8.2 15 21.8 43.5 75 119 176 242 330 471 596 904
N·m 3.6 7 11 20 29 58 100 159 235 323 440 628 794 1205
TORQUE SPECIFICATIONS
HEX HEAD CAP SCREWS
* Grade 5 marking --
U.S. Standard Hardware
The torque values shown should be used as a general guideline when specific torque values are not given.
** Grade 8 marking --
Grade
Shank Size (Diameter in millimeters, fine or coarse thread)
Grade
8.8*
Grade
10.9**
Grade
12.9***
Metric Standard Hardware
* Grade 8.8 marking -- ** Grade 10.9 marking -- *** Grade 12.9 marking --
8.8 10.9 12.9
SAE
grade 8 **
Grade
Shank Size (Diameter in inches, fine or coarse thread)
SAE
grade 5 *
Flangelock
Screw w/
Flangelock
Nut
1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1 1/8
18 38 62 108 156 224 305 502 801 1211 1912
9 18 31 50 75 110 150 250 378 583 782
12 24 42 68 102 150 203 339 513 790 1060
13 28 46 75 115 165 225 370 591 893 1410
24 40
33 54
ft.-lbs.
N·m
ft.-lbs.
ft.-lbs.
N·m
N·m
*
**
Minimum commercial quality (Lower quality not recommended).
Note the minimum grade for the U.S. standard bolt is grade 5.