MacDon M Series - Page 372

REFERENCE
Table 6.2 SAE Grade 5 Bolt and Grade F Distorted
Thread Nu t
Torque (N·m)
Torque (ft·lb
f)
(*in·lbf)
Nominal
Size (A)
Min. Max. Min. Max.
1/4-20
8.1 9
*72 *80
5/16-18
16.7 18.5
*149 *164
3/8-16
30 33 22 24
7/16-14
48 53 35 39
1/2-13
73 80 54 59
9/16-12
105 116
77
86
5/8-11
144 160 107 118
3/4-10
259 286 192 212
7/8-9
413 456 306 338
1-8 619 684 459 507
Figure 6.2: Bolt Grades
A-NominalSize B-SAE-8
C - SAE-5 D - SAE-2
Table 6.3 SAE Grade 8 Bolt and Grade G Distorted
Thread Nu t
Torque (N·m
)
Torque (ft·
lbf)
(*in·lbf)
Nominal
Size (A)
Min. Max. Min. Max.
1/4-20
16.8 18.6
*150 *165
5/16-18
24 26 18 19
3/8-16
42 46 31 34
7/16-14
67 74 50
55
1/2-13
102 113 76 84
9/16-12
148 163 109 121
5/8-11
204 225 151 167
3/4-10
362 400 268 296
7/8-9
583 644 432 477
1-8 874 966 647 716
Figure 6.3: Bolt Grades
A-NominalSize B-SAE-8
C - SAE-5 D - SAE-2
147962 358 Revision A