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TM 9-2350-287-20-2
C-3. HOW TO USE TORQUE TABLE (continued).
Table C-2. Torque Limits for Wet 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
FOOT-
N.m
FOOT-
FOOT-
N.m
FOOT-
IN.
PER INCH
POUNDS
POUNDS
POUNDS
POUNDS
1/4
20
6.35
4.9
6.10
7.2
9.76
9.0
12.0
10.8
14.64
1/4
28
6.35
5.4
7.33
9.0
12.20
—
—
12.6
17.06
5/16
18
7.84
9.9
13.34
15.3
22.54
17.1
23.18
21.6
29.27
5/16
24
7.94
11.7
15.87
17.1
23.18
—
—
24.3
32.95
3/8
16
9.53
16.2
21.97
27.9
37.84
30.6
41.49
39.6
53.69
3/8
24
9.53
18.0
24.41
31.5
42.71
—
—
44.1
59.80
7/16
14
11.11
25.2
34.17
44.1
59.80
49.5
67.12
63.0
85.42
7116
20
—
27.0
36.61
49.5
67.12
—
—
70.2
95.19
1/2
13
12.70
35.1
47.58
67.5
91.53
76.5
103.73
94.5
128.14
1/2
20
—
36.9
50.04
76.5
103.73
—
—
106.0
146.50
9/16
12
14.28
45.9
62.24
99.0
134.24
108.0
146.45
139.5
189.16
8/16
18
—
45.5
67.12
106.0
146.45
—
—
153.0
207.47
5/8
11
15.88
56.7
76.89
135.0
183.06
150.3
203.80
189.0
256.28
5/8
18
—
85.5
115.84
153.0
207.47
—
—
216.0
296.90
3/4
10
19.05
94.5
128.14
243.0
329.51
252.0
341.71
337.5
457.65
3/4
16
—
103.5
140.35
265.5
360.2
—
—
378.0
536.87
7/8
9
22.23
144.0
195.26
355.5
482.06
396.0
536.98
544.5
738.34
7/8
14
—
157.5
213.57
391.5
530.87
—
—
607.5
823.77
1
8
25.40
211.5
286.79
531.0
720.04
594.0
805.46
819.0
1110.56
1
14
—
225.0
305.10
594.0
805.46
—
—
891.0
1208.20
1-1/8
—
25.58
—
—
720.0
976.32
—
—
1152.0
1562.13
792.0
1073.97
1286.0
1757.52
1-1/4
—
31.75
—
—
—
—
—
—
1638.0
2221.11
1800.0
2440.80
1-3/8
—
34.93
—
—
1314.0
1781.82
—
—
2742.0
2904.57
1512.0
2050.28
2448.0
3319.47
1-1/2
—
38.10
—
—
1746.0
2367.54
—
—
2844.0
3856.50
1880.0
2684.88
3204.0
4344.66
N.m
N.m
C-4. TIGHTENING METAL FASTENERS.
When torquing a fastener, select a torque wrench whose range (Table C-3) fits the required torque value. A torque
wrench is most accurate from 25 percent to 75 percent of its stated range. A torque wrench with a stated range of 0
to 100 will be most accurate from 25 to 75 foot-pounds. The accuracy of readings will decrease as you approach 0
foot-pounds or 100 foot-pounds. The ranges in Table C-3 are based on this principle.
C-3
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