MacDon A40-D, Operator'S Manual

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Revision A
Figure 8.4: Bolt Grades
A - Nominal Size B - SAE-8
C - SAE-5 D - SAE-2
Table 8.4 SAE Grade 8 Bolt and Grade 8 Free
Spinning Nut
Nominal
Size (A)
Torque (Nm)
Torque (lbf·ft)
(*lbf·in)
Min. Max. Min. Max.
1/4-20 16.8 18.6 *150 *165
5/16-18
35 38 26 28
3/8-16 61 68 46 50
7/16-14 98 109 73 81
1/2-13 150 166 111 123
9/16-12 217 239 160 177
5/8-11
299 330 221 345
3/4-10 531 587 393 435
7/8-9 855 945 633 700
1-8 1165 1288 863 954
Metric Bolt Specifications
Figure 8.5: Bolt Grades
Table 8.5 Metric Class 8.8 Bolts and Class 9 Free
Spinning Nut
Nominal
Size (A)
Torque (Nm)
Torque (lbf·ft)
(*lbf·in)
Min. Max. Min. Max.
3-0.5 1.4 1.6 *13 *14
3.5-0.6 2.2 2.5 *20 *22
4-0.7 3.3 3.7 *29 *32
5-0.8 6.7 7.4 *59 *66
6-1.0 11.4 12.6 *101 *112
8-1.25 28 30 20 23
10-1.5 55 60 40 45
12-1.75 95 105 70 78
14-2.0 152 168 113 124
16-2.0 236 261 175 193
20-2.5 460 509 341 377
24-3.0 796 879 589 651
REFERENCE