MacDon FD75 OM User Manual
Page 259

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
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