SPEClFlCATlONS
STANDARD BOLT AND NUT TORQUE SPECIFICATIONS
260M BOLTS
280M OR BETTER
THREAD
THREAD
SIZE
SIZE
(lb-ft)
Nm
(lb-ft)
Nm
1/4 -20
.................................
5- 7
10-12
1/4 -20
7-9
7- 9
....................................
6- 8
1 / 4 -28
11-14
1 / 4 -28
....................................
8-11
.................................
8-10
10-13
.................................
5/16-18
5/16-18
....................................
18-23
14-18
13-17
................................
11-14
5/16-24
20-26
5/16-24
....................................
15-19
15-19
23-26
41-47
3/8 -16
.................................
3/8 -16
....................................
31-35
30-35
26-29
3/8 -24
.................................
47-53
3/8 -24
35-40
35-39
....................................
.................................
35-38
7/16-14
62-68
7/16-14
....................................
47-51
46-50
43-46
7/16-20
77-83
7/16-20
...................................
58-62
.................................
57-61
53-56
1 / 2 -13
1 / 2 -13
....................................
................................
96-102
72-76
71-75
62-70
1 / 2 -20
113-126
1 / 2 -20
....................................
.................................
84-95
83-93
.................................
68-75
9/16-12
122-136
9/16-12
....................................
90-100
92-102
80-88
9/16-18
................................
146-159
9/16-18
....................................
109-119
107-117
103-110
................................
5/8 -11
5/8 -11
....................................
186-200
140-149
137-147
126-134
.................................
5 / 8 -18
5 / 8 -18
228-242
171-181
....................................
168-178
180-188
................................
3 / 4 -10
325-339
3/4 -10
....................................
240-250
244-254
218-225
3/4 -16
.................................
3 / 4 -16
....................................
393-407
290-300
295-305
308-315
7/8 - 9
................................
417-427
7/8 - 9
556-569
410-420
...................................
.................................
356-364
7 / 8 -14
7 / 8 -14
644-657
....................................
475-485
483-494
435-443
1-8
1 -8
................................
580-590
786-800
590-600
..................................
514-521
1 -14
.................................
1 -14
928-342
697-705
685-695
...................................
Grade identification markings are normally stamped on the heads of the bolts. To aid identification of the various
bolts used in Detroit Diesel engines, refer to the following chart.
BOLT IDENTIFICATION CHART
Fuel System and Governor
11C-55