MacDon M155 Operators Manual - Manual (Page 267)

MAINTENANCE AND SERVICING
Table 5.2 SAE Grade 5 Bolt and Grade 5 Distorted
Thread Nut
Torque (ft·lbf)
(*in·lbf)
Torque (N·m) Nominal
Size (A)
Min. Max. Min. Max.
1/4-20 *72 *80 8.1 9
5/16-18 *149 *164 16.7 18.5
3/8-16 22 24 30 33
7/16-14 35 39 48 53
1/2-13 54 59 73 80
9/16-12 77 86 105 116
5/8-11 107 118 144 160
3/4-10 192 212 259 286
7/8-9 306 338 413 456
1-8 459 507 619 684
Table 5.3 SAE Grade 8 Bolt and Grade 8 Distorted
Thread Nut
Torque (ft·lbf)
(*in·lbf)
Torque (N·m)
Nominal
Size (A)
Min. Max. Min. Max.
1/4-20 *150 *165 16.8 18.6
5/16-18 18 19 24 26
3/8-16 31 34 42 46
7/16-14 50 55 67 74
1/2-13 76 84 102 113
9/16-12 109 121 148 163
5/8-11 151 167 204 225
3/4-10 268 296 362 400
7/8-9 432 477 583 644
1-8 647 716 874 966
Figure 5.2: Bolt Grades
A - Nominal Size B - SAE-8
C - SAE-5 D - SAE-2
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Revision A