SPEClFlCATlONS
STANDARD BOLT AND NUT TORQUE SPECIFICATIONS
280M OR BETTER
26OM BOLTS
THREAD
THREAD
SIZE
(lb-ft)
Nm
(lb-ft)
Nm
SIZE
.............................
7-9
10-12
7-9
1/4-20
5-7
1/4 -20
..............................
.............................. 8 - 1 0
11-14
8-11
1/4-28
6-8
1 / 4 -28
..............................
5/16-18
............................ 13-17
18-23
14-18
.............................. 10-13
5/16-18
............................ 15-19
5/16-24
20-26
.............................. 11-14
15-19
5/16-24
41-47
............................ 30-35
31-35
3/8-16
3/8 -16
.............................. 23-26
............................ 35-39
47-53
35-40
3/8-24
.............................. 26-29
3 / 8 -24
7/16-14
............................. 46-50
47-51
62-68
7/16-14
.............................. 35-38
.............................. 57-61
77-83
7/16-20
7/16-20
.............................. 43-46
58-62
.............................. 71-75
96-102
72-76
1/2-13
1 / 2 -13
.............................. 53-56
113-126
.............................. 83-93
1/2-20
84-95
1 / 2 -20
.............................. 62-70
.............................. 90-100
9/16-12
122-136
92-102
9/16-12
.............................. 68-75
.............................. 107-117
146-159
9/16-18
9/16-18
............................. 80-88
109-119
.............................. 137-147
186-200
.............................. 103-110
140-149
5/8-11
5 / 8 -11
.............................. 168-178
171-181
5/8-18
228-242
.............................. 126-134
5 / 8 -18
3/4-10
.............................. 240-250
325-339
244-254
3/4 -10
.............................. 180-188
............................. 290-300
393-407
3/4-16
3 / 4 -16
.............................. 218-225
295-305
............................ 410-420
556-569
7/8 - 9
.............................. 308-315
417-427
7/8 - 9
................................. 475-485
644-657
483-494
7/8-14
7 / 8 -14
.............................. 356-364
.............................. 580-590
1-8
786-800
1-8
............................. 435-443
590-600
............................... 685-695
1 - 14
928-942
1
-14
.............................. 514-521
697-705
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.
No ne
No ne
BOLT IDENTIFICATION CHART
Cooling System
11F-19