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TM 9-2350-287-20-2
C-3. HOW TO USE TORQUE TABLE- (continued).
5.
6.
To find the grade of the screw that is to be installed, match the markings on the head to the correct picture of
CAPSCREW HEAD MARKINGS on the table.
Manufacturer’s marks may vary.
These are all SAE Grade 5 (3 lines).
Look down the column under the picture found in step 5 until the torque limit in foot-pounds for the diameter and
threads per inch of the screw being installed is found.
Table C-1. Torque Limits for Dry Fasteners
SIZE
TORQUE
SAE GRADE
SAE GRADE
SAE GRADE
SAE GRADE
No. 1 or 2
No. 5
No. 6 or 7
No. 8
DIA.
THREADS
MMs
F O O T - N . m
FOOT-
FOOT-
N.m
FOOT-
IN.
PER INCH
POUNDS
POUNDS
POUNDS
POUNDS
¼
20
6.35
5
6.78
8.0
10.85
10
13.56
12.0
16.27
¼
28
6.35
6
8.14
10.0
13.56
—
—
14.0
18.98
5/16
18
7.94
11
14.82
17.0
23.05
19
25.76
24.0
32.52
5/16
24
7.94
13
17.63
19.0
25.76
—
—
27.0
36.61
3/8
16
9.53
18
24.41
31.0
42.04
34
46.10
44.0
59.66
3/8
24
9.53
20
27.12
35.0
47.46
—
—
49.0
66.44
7/16
14
11.11
28
37.97
49.0
66.44
55
74.58
70.0
94.92
7116
20
—
30
40.68
55.0
74.58
—
—
78.0
105.77
1/2
13
12.70
39
52.88
75.0
101.70
85
115.26
105.0
142.38
½
20
—
41
55.60
85.0
115.26
—
—
120.0
162.78
9/16
12
14.28
51
69.16
110.0
149.16
120
162.72
155.0
210.18
9/16
18
—
55
74.58
120.0
162.72
—
—
170.0
230.52
5/8
11
15.88
63
85.43
150.0
203.40
167
226.45
210.0
284.76
5/8
18
—
85
128.82
170.0
230.52
—
—
240.0
325.44
3/4
10
19.05
105
142.38
270.0
356.12
280
379.68
375.0
506.50
3/4
16
—
115
155.84
285.0
400.02
—
—
420.0
586.52
7/8
9
22.23
160
216.86
375.0
536.62
440
595.64
605.0
820.38
7/8
14
—
175
237.30
435.0
589.85
—
—
675.0
915.30
1
8
25.40
235
318.66
590.0
800.04
694.86
910.0
1233.86
1
14
—
250
338.00
660.0
894.96
—
—
990.0
1342.44
1-1/8
—
25.58
—
—
800.0
1064.8
—
—
1280.0
1735.7
880.0
1193.3
1444.0
1%2.8
1-1/4
—
31.75
—
—
—
—
—
—
1820.0
2467.9
2000.0
2712.0
1-3/8
—
34.93
—
—
1460.0
1979.8
—
—
2300.0
3227.3
1680.0
2278.1
2720.0
3688.3
1-1/2
—
38.10
—
—
1840.0
2630.6
—
—
3160.0
4285.0
2200.0
2863.2
3560.0
4827.4
N.m
N.m
660
C-2
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