TM 9-2320-366-34-2
APPENDIX E
TORQUE LIMITS
Table E-2. Dry Torque Limits for SAE and ANSI Prevailing Torque Nuts
Material Grade Markings
SAE Grade 5
SAE Grade 8
Hole
Diameter
Threads
per inch
Torque
inch
lb-ft
N·m
lb-ft
N·m
1/4
20
10-12
14-16
15-17
20-24
1/4
28
12-14
16-18
14-18
21-25
5/16
18
20-24
27-33
26-32
36-44
5/16
24
22-26
30-36
29-35
40-48
3/8
16
35-41
47-55
48-58
65-77
3/8
24
38-46
53-63
53-63
72-86
7/16
14
55-65
74-88
75-91
103-123
7/16
20
60-70
81-97
80-98
110-132
1/2
13
86-102
116-138
113-137
154-184
1/2
20
92-110
125-149
127-153
177-207
9/16
12
120-144
162-194
168-202
229-273
9/16
18
135-161
183-219
179-217
244-294
5/8
11
165-199
226-270
226-272
306-368
5/8
18
181-219
246-296
244-296
331-401
3/4
10
296-354
402-480
395-479
538-648
3/4
16
310-376
422-508
424-516
576-698
7/8
9
460-554
625-749
612-746
833-1009
7/8
14
503-607
684-822
652-800
888-1082
1
8
686-828
933-1121
941-1141
1280-1544
E-4
