TM 9-2350-256-20
TABLE F-1. TORQUE LIMITS FOR DRY FASTENERS.
Torque
Size
SAE Grade
No. 1 or 2
SAE Grade
No. 5
SAE Grade
No. 6 or 7
SAE Grade
No. 8
Dia.
Threads
(In.)
Per 1 In.
Dia
(25.4 Mm)
(Mm)
Lb-ft
N m
Lb-ft
N m
Lb-ft
N m
Lb-ft
N m
1/4
20
6.35
5
6.78
8
10.85
10
13.56
12
16.27
1/4
28
6.35
6
8.14
10
13.56
-
-
14
18.98
5/16
18
7.94
11
14.92
17
23.05
19
25.76
24
32.52
5/16
24
7.94
13
17.63
19
25.76
-
-
27
36.61
3/8
16
9.53
18
24.41
31
42.04
34
46.1
44
59.66
3/8
24
9.53
20
27.12
35
47.46
-
-
49
66.44
7/16
14
11.11
28
37.97
49
66.44
55
74.58
70
94.92
7/16
20
-
30
40.68
55
74.58
-
-
78
105.77
1/2
13
12.7
39
52.88
75
101.7
85
115.26
105
142.38
1/2
20
-
41
55.6
85
115.26
-
-
120
162.78
9/16
12
14.29
51
69.16
110
149.16
120
162.72
155
210.18
9/16
18
-
55
74.58
120
162.72
-
-
170
230.52
5/8
11
15.88
63
85.43
150
203.4
167
226.45
210
284.76
5/8
18
-
95
128.82
170
230.52
-
-
240
325.44
3/4
10
19.05
105
142.38
270
366.12
280
379.68
375
508.5
3/4
16
-
115
155.94
295
400.02
-
-
420
596.52
7/8
9
22.23
160
216.96
395
535.62
440
596.64
605
820.38
7/8
14
-
175
237.3
435
589.86
-
-
675
915.3
1
8
25.4
235
318.66
590
800.04
660
894.96
910
1233.96
1
14
-
250
339
660
894.96
-
-
990
1342.44
1-1/8
-
28.58
-
-
800
1084.8
-
-
1280
1735.7
880
1193.3
1440
1952.8
1-1/4
-
31.75
-
-
-
-
-
-
1820
2467.9
-
-
-
-
2000
2712
1-3/8
-
34.93
-
-
1460
1979.8
-
-
2380
3227.3
1680
2278.1
-
-
2720
3688.3
1-1/2
-
38.1
-
-
1940
2630.6
-
-
3160
4285
2200
2983.2
-
-
3560
4827.4
F-3
