MacDon M155 Operators Manual - Manual (Page 268)

MAINTENANCE AND SERVICING
Table 5.4 SAE Grade 8 Bolt and Grade 8 Free
Spinning 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 26 28 35 38
3/8-16 46 50 61 68
7/16-14 73 81 98 109
1/2-13 111 123 150 166
9/16-12 160 177 217 239
5/8-11 221 345 299 330
3/4-10 393 435 531 587
7/8-9 633 700 855 945
1-8 863 954 1165 1288
5.2.2 Metric Bolt Specifications
Table 5.5 Metric Class 8.8 Bolts and Class 9 Free
Spinning Nut
Torque (ft·lbf)
(*in·lbf)
Torque (N·m) Nominal
Size
Min. Max. Min. Max.
3-0.5 *13 *14 1.4 1.6
3.5-0.6 *20 *22 2.2 2.5
4-0.7 *29 *32 3.3 3.7
5-0.8 *59 *66 6.7 7.4
6-1.0 *101 *112 11.4 12.6
8-1.25 20 23 28 30
10-1.5 40 45 55 60
12-1.75 70 78 95 105
14-2.0 113 124 152 168
16-2.0 175 193 236 261
20-2.5 341 377 460 509
24-3.0 589 651 796 879
Figure 5.3: Bolt Grades
A - Nominal Size
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Revision A