MacDon FD75 OM - Manual (Page 259)

MAINTENANCE AND SERVICING
Table 6.1 SAE Grade 5 Bolt and Grade 5 Free
Spinning Nut
Torque (ft·lbf)
(*in·lbf)
Torque (N·m)
Nominal
Size (A)
Min. Max. Min. Max.
1/4-20 *106 *117 11.9 13.2
5/16-18 *218 *241 24.6 27.1
3/8-16 32 36 44 48
7/16-14 52 57 70 77
1/2-13 79 87 106 118
9/16-12 114 126 153 170
5/8-11 157 173 212 234
3/4-10 281 311 380 420
7/8-9 449 496 606 669
1-8 611 676 825 912
Figure 6.1: Bolt Grades
A - Nominal Size B - SAE-8
C - SAE-5 D - SAE-2
Table 6.2 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
Figure 6.2: Bolt Grades
A - Nominal Size B - SAE-8
C - SAE-5 D - SAE-2
169894 245 Revision A