MacDon R113 - Page 273

REFERENCE
Table 7.3 SAE Grade 5 Bolt and Grade F Distorted
Thread Nut
Torque (ft·lb
f)
(*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 7.2: Bolt Grades
A-NominalSize B-SAE-8
C - SAE-5 D - SAE-2
Table 7.4 SAE Grade 8 Bolt and Grade G 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 7.3: Bolt Grades
A-NominalSize B-SAE-8
C - SAE-5 D - SAE-2
147910 261 Revision A