US Bolt Torque
Recommended Torque (Ft-Lbs)
Size |
Grade 5 Coarse |
Grade 5 Fine |
Grade 8 Coarse |
Grade 8 Fine |
18-8 SS Coarse |
18-8 SS Fine |
Bronze Coarse |
Bronze Fine |
Brass Coarse |
Brass Fine |
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 |