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US Recommended Bolt Torque

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Size
Recommended Torque
for Bolts with No Lubrication Applied to Threads
Grade 5
Grade 8
18-8 S/S
Bronze
Brass
Coarse
Fine
Coarse
Fine
Coarse
Fine
Coarse
Fine
Coarse
Fine
#4*
-
-
-
-
5.2
-
4.8
-
4.3
-
#6*
-
-
-
-
9.6
-
8.9
-
7.9
-
#8*
-
-
-
-
19.8
-
18.4
-
16.2
-
#10*
-
-
-
-
22.8
31.7
21.2
29.3
18.6
25.9
1/4
8
10
12
14
6.3
7.8
5.7
7.3
5.1
6.4
5/16
17
19
24
27
11
11.8
10.3
10.9
8.9
9.7
3/8
31
35
44
49
20
22
18
20
16
18
7/16
49
55
70
78
31
33
29
31
26
27
1/2
75
85
105
120
43
45
40
42
35
37
9/16
110
120
155
170
57
63
53
58
47
51
5/8
150
170
284
323
93
104
86
96
76
85
3/4
270
295
510
568
128
124
104
102
118
115
7/8
395
435
813
902
194
193
178
178
159
158
1
590
660
905
1030
287
289
265
240
235
212
* Sizes from 4 to 10 are in in.-lbs.
Sizes from 1/4 up are in Ft. -lbs.
 

 

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2006 Kevin Bohn, Shopdawg.com, a Division of Mustang Marketing
Page last updated Thursday, May 04, 2006 09:05