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TM 9-2350-287-34
C-3. HOW TO USE TORQUE TABLE (continued).
Table C-2. Torque Limits for Wet Fasteners
SAE CAPSCREW HEAD
MARKINGS
TORQUE
SIZE
SAE GRADE
SAE GRADE
SAE GRADE
SAE GRADE
No. 1 or 2
No. 5
No. 6 or 7
No. 8
DIA
THREADS
MM
FOOT-
FOOT-
FOOT-
FOOT-
IN.
POUNDS N•m
POUNDS N•m
N•m
N•m
PER INCH
POUNDS
POUNDS
1/4
20
6.35
4.90
6.10
7.20
9.76
9.00
12.20
10.80
14.64
1/4
28
6.35
5.40
7.33
9.00
12.20
-
12.60
17.08
5/16
18
7.94
9.90
13.34
15.30
22.54
17.10
23.18
21.60
29.27
5/16
24
7.94
11.70
15.87
17.10
23.18
-
24.30
32.95
3/8
16
9.53
16.20
21.97
27.90
37.84
30.60
41.49
39.60
53.69
3/8
24
9.53
18.00
24.41
31.50
42.71
-
44.10
59.80
7/16
14
11.11
25.20
34.17
44.10
59.80
49.50
67.12
63.00
85.42
7/16
20
-
27.00
36.61
49.50
67.12
-
70.20
95.19
1/2
13
12.70
35.10
47.59
67.50
91.53
76.50
103.73
94.50
128.14
1/2
20
-
36.90
50.04
76.50
103.73
-
108.00
146.50
9/1 6
12
14.29
45.90
62.24
99.00
134.24
108.00
146.45
139.50
189.16
9/16
18
-
49.50
67.12
108.00
146.45
-
153.00
207.47
5/8
11
15.88
56.70
76.89
135.00
183.06
150.30
203.80
189.00
256,28
5/8
18
-
85.50
1115.49
153.00
207.47
-
216.00
296.90
3/4
10
19.05
94.50
128.14
243.00
329.51
252.00
341.71
337.50
457.65
314
16
-
103.50
140.35
265.50
360.20
-
378.00
536.87
718
9
22.23
144.00
195.26
355.50
482.06
396.00
536.98
544.50
738.34
7/8
14
-
157.50
213.57
391.50
530.87
-
607.50
823.77
1
8
25.40
211.50
286.79
531.00
720.04
594.00
805.46
819.00 1110.56
1
14
-
225.00
305.10
594.00
805.46
-
891.00 1208.20
1 1/8
-
25.58
720.00
976.32
-
1152.00 1562.13
792.00
1073.97
1296.00 1757.52
1114
-
31.75
-
2221.11
2440.80
1318
-
34.93
-
1314.00
1781.82
-
2142.00
2904.57
1512.00
2050.29
2446.00 3319.47
1 1/2
-
38.10
-
1746.00
2367.54
-
2844.00 3856.50
1980.00
2684.88
3204.00 4344.66
C-4. TIGHTENING METAL FASTENERS.
When torquing a fastener, select a torque wrench whose range (Table C-3, p. C-4) 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 O to 100 will be most accurate from 25 to 75 foot-pounds. The accuracy of readings will decrease as you approach
O foot-pounds or 100 foot-pounds. The ranges in Table C-3 are based on this principle.
C-3
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