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Appendix 37
Bolt Torque & Size Charts (Rev. 3/28/2007)
BOLT TORQUE CHART
Always tighten hardware to these values unless a different torque value or tightening procedure is listed for a specific
application.
Fasteners must always be replaced with the same grade as specified in the manual parts list.
Always use the proper tool for tightening hardware: SAE for SAE hardware and Metric for metric hardware.
Make sure fastener threads are clean and you start thread engagement properly.
All torque values are given to specifications used on hardware defined by SAE J1701 MAR 99 & J1701M JUL 96.
Diameter
(Inches)
Wrench
Size
MARKING ON HEAD
SAE 2 SAE 5 SAE 8
lbs-ft N-m lbs-ft N-m lbs-ft N-m
1/4" 7/16" 6 8 10 13 14 18
5/16"1/2"121719262737
3/8"9/16"233135474967
7/16"5/8"3648557578106
1/2" 3/4" 55 75 85 115 120 163
9/16" 13/16" 78 106 121 164 171 232
5/8" 15/16" 110 149 170 230 240 325
3/4" 1-1/8" 192 261 297 403 420 569
7/8" 1-5/16" 306 416 474 642 669 907
1" 1-1/2" 467 634 722 979 1020 1383
Diameter &
Thread Pitch
(Millimeters)
Wrench
Size
Coarse Thread Fine Thread
Diameter &
Thread Pitch
(Millimeters)
Marking on Head Marking on Head
Metric 8.8 Metric 10.9 Metric 8.8 Metric 10.9
N-m lbs-ft N-m lbs-ft N-m lbs-ft N-m lbs-ft
6 x 1.0 10 mm 8 6 11 8 8 6 11 8 6 x 1.0
8 x 1.25 13 mm 20 15 27 20 21 16 29 22 8 x 1.0
10 x 1.5 16 mm 39 29 54 40 41 30 57 42 10 x 1.25
12 x 1.75 18 mm 68 50 94 70 75 55 103 76 12 x 1.25
14 x 2.0 21 mm 109 80 151 111 118 87 163 120 14 x 1.5
16 x 2.0 24 mm 169 125 234 173 181 133 250 184 16 x 1.5
18 x 2.5 27 mm 234 172 323 239 263 194 363 268 18 x 1.5
20 x 2.5 30 mm 330 244 457 337 367 270 507 374 20 x 1.5
22 x 2.5 34 mm 451 332 623 460 495 365 684 505 22 x 1.5
24 x 3.0 36 mm 571 421 790 583 623 459 861 635 24 x 2.0
30 x 3.0 46 mm 1175 867 1626 1199 1258 928 1740 1283 30 x 2.0
A
SAE SERIES
TORQUE
CHART
SAE Bolt Head
Identification
SAE Grade 2
(No Dashes)
SAE Grade 5
(3 Radial Dashes)
SAE Grade 8
(6 Radial Dashes)
A
METRIC SERIES
TORQUE
CHART
Metric Bolt Head
Identification
8.8
Metric
Grade 10.9
10.9
Metric
Grade 8.8
A
A
A
Typical Washer
Installations
Lock Washer
Flat Washer
8/9/00
Bolt