TM 5-6115-275-14
NAVFAC P-8-615-14
TO 35C2-3-452-1
Table 1-1. Bolt Capscrew and Nut Torque Wrench Specifications
Standard Torque Specifications for Engine Capscrews and Nuts
Capscrew Grade Identification - Capscrew heads are marked as follows:
Grade 2
No Marks
Grade 5
Three Marks - 120 apart
Grade 8
Six Marks - 60 apart
SAE STANDARD TORQUE SPECIFICATIONS IN POUND-FEET*
GRADE 2
GRADE 5
GRADE 8
SIZE
NC
NF
NC
NF
NC
NF
¼’'
5-7
6-8
9-11
11-13
12-14
14-16
(0.64
(0.69-0.97
(0.83-1.11
(1.24-1.52
1.52-1.80
1.66-1.94
1.94-2.21
cm)
kgm)
kgm)
kgm)
kgm)
kgm)
kgm)
5/16”
11-13
13-15
18-20
21-23
25-27
28-30
(0.90
(1.52-1.80
(1.80-2.07
(2.49-2.77
(2.90-3.18
3.46-3.73
(3.87-4.15
cm)
kgm)
kgm)
kgm)
kgm)
kgm)
kgm)
3/8"
18-21
19-22
28-33
30-35
41.46
43-48
(0.95
(2.49-2.90
(2.63-3.04
(3.87-4.56
4.15-4.84
5.67-6.36
5.95-6.64
cm)
kgm)
kgm)
kgm)
kgm)
kgm)
kgm)
7/16”
30-33
32-35
44-49
50-55
69-74
72-77
(1.11
4.15-4.56
(4.43-4.84
(6.09-6.78
(6.9-7.61
(9.54-10.23
(9.96-10.65
cm)
kgm)
kgm)
kgm)
kgm)
kgm)
kgm)
1/2"
45-60
45-60
68-73
68-73
95-105
95-106
(1.27
(6.22-6.92
(6.22-6.92
(9.40-10.10
(9.40-10.10
(13.14-14.52
(13.14-14.52
cm)
kgm)
kgm)
kgm)
kgm)
kgm)
kgm)
9/16"
60-65
60-65
9-10
95-105
130-140
130-140
(1.43
(8.30-8."
(8.30-8.99
(13.14-14.52
(13.14-14.52
(17.98-19.38
(17.98-19.36
cm)
kgm)
kgm)
kgm)
kgm)
kgm)
kgm)
5/8"
75-85
75-85
125-135
125-135
170-190
170-190
(1.59
(10.37-11.76
(10.37-11.76
(17.29-18.67
(17.29-18.67
(23.51-26.28
(23.51-26.28
cm)
kgm)
kgm)
kgm)
kgm)
kgm)
kgm)
3/4"
125-135
125-135
210-230
210-230
290-310
290-310
(1.91
(17.29-18.67
(17.29-18.67
(29.04-31.81
(29.04-31.81
(40.11-42.87
(40.11-42.87
cm)
kgm)
kgm)
kgm)
kgm)
kgm)
kgm)
7/8"
105-115
105115
290-310
290-310
450-500
450-500
(2.22
(14.52-15.91
(14.52-15.91
(40.11-42.87
(40.11-42.87
(62.24-69.15
(62.24-69.15
cm)
kgm)
kgm)
kgm)
kgm)
kgm)
kgm)
1"
140-150
450-475
380-410
600-630
(2.54
(19.36-20.75
(62.24-65.69
(52.54-56.70
(82.98-87.13
cm)
kgm)
kgm)
kgm)
kgm)
* All torque values listed in this table are for threads lubricated with engine oil.
1-11
