MacDon FD75 OM - Manual (Page 260)

MAINTENANCE AND SERVICING
Table 6.3 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 6.3: Bolt Grades
A - Nominal Size B - SAE-8
C - SAE-5 D - SAE-2
Table 6.4 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
Figure 6.4: Bolt Grades
A - Nominal Size B - SAE-8
C - SAE-5 D - SAE-2
169894 246 Revision A