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Page Title:
Table F-1. Dry Torque Limits for SAE and ANSI Screws and Free Spinning Nuts |
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 TM 9-2320-366-20-1
APPENDIX F
TORQUE LIMITS
Material Grade Markings
NOTE
Manufacturer's marks
may vary. These are all
SAE Grade 5.
SAE Grade 2
SAE Grade 5
SAE Grade 8
Diameter
Threads
per inch
inch
lb-ft
Nm
lb-ft
Nm
lb-ft
Nm
20
1/4
3-5
5-7
5-7
8-10
8-10
10-14
1/4
28
4-6
5-7
6-8
9-11
8-12
12-16
1/4
32
4-6
5-7
7-9
9-11
9-13
12-16
5/16
18
7-9
9-13
11-15
15-21
15-21
21-29
5/16
24
8-10
11-15
12-16
17-23
17-23
24-32
5/16
32
9-11
12-16
14-18
18-24
19-25
27-34
3/8
16
13-17
17-23
20-26
27-35
28-38
38-50
3/8
24
15-19
20-26
22-30
31-41
32-42
43-57
3/8
32
15-21
21-27
24-32
33-43
33-45
55-61
7/16
14
20-28
28-38
32-42
43-57
44-60
61-81
7/16
20
23-31
31-41
35-47
48-64
49-67
68-90
7/16
28
25-33
33-45
37-51
51-69
54-72
73-97
1/2
13
32-42
43-57
49-65
66-88
68-92
93-123
1/2
20
35-47
48-64
55-73
74-98
77-103
105-139
1/2
28
38-50
51-67
58-78
79-105
82-110
111-149
9/16
12
55-61
62-82
70-94
95-127
98-132
134-178
9/16
18
50-68
69-91
78-104
105-141
109-147
149-199
9/16
24
53-71
72-96
82-110
111-149
115-155
158-210
5/8
11
62-84
85-113
95-129
131-175
136-182
184-246
5/8
18
70-94
96-128
108-146
148-198
154-206
209-279
5/8
24
73-99
100-134
114-154
155-207
161-217
219-293
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