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STANDARD STEEL BOLT TORQUE VALUES *

 

SAE GRADE

BOLT SIZE
Dia. -  Threads Per In.

1 OR 2

Grade 1-2  Bolt Head

5

Grade 5 Bolt Head

6 OR 7

Grade 6-7 Bolt Head

8

Grade 8 Bolt Head

Ft.-Lbs
kgm
Nm
Ft.-Lbs
kgm
NM
Ft.-Lbs
kgm
NM
Ft.-Lbs
kgm
NM
1/4" - 20
5
0.7
6.8
8
1.1
10.8
10
1.4
13.5
12
1.67
16
1/4" - 28
6
0.8
8.1
10
1.4
13.6
 
 
 
14
1.93
19
5/16" - 18
11
1.5
14.9
17
2.3
23
19
2.6
25.8
24
3.3
33
5/16"- 24 
13
1.8
17.6
19
2.6
25.7
 
 
 
26
3.6
35
3/8" - 16
18
2.5
24.4
31
4.3
42
34
4.7
46
44
6.1
60
3/8" - 24
20
2.75
27.1
35
4.8
47.5
 
 
 
49
6.8
66
7/16" - 14
28
3.8
37
49
6.8
66.4
55
7.6
74.5
71
9.8
96
7/16" - 20
30
4.2
40.7
55
7.6
74.5
 
 
 
77
10.6
104
1/2" - 13 
39
5.4
52.8
75
10.4
101.7
85
11.75
115.2
104
14.4
141
1/2" - 20
41
5.7
55.6
85
11.7
115.2
 
 
 
121
16.7
164
9/16" - 12
51
7
69.2
110
15.2
149
120
16.6
162.7
154
21
209
9/16" - 18
55
7.6
74.5
120
16.6
162.7
 
 
 
170
23.5
230
5/8" - 11
83
11.5
112.5
150
20.7
203.3
167
23
226.5
209
28.9
283
5/8" - 18
95
13.1
128.8
170
23.5
230.5
 
 
 
236
32.6
319
3/4" - 10
105
14.5
142.3
270
37.3
366
280
38.7
379.6
374
51.7
507
3/4" - 16
115
15.9
155.9
295
40.8
400
 
 
 
418
57.8
566
7/8"- 9 
160
22.1
216.9
395
54.6
535.5
440
60.9
569.5
605
83.6
820
7/8" - 14
175
24.2
237.2
435
60.1
589.7
 
 
 
671
92.7
909
1" - 8
236
32.5
318.6
590
81.6
799.9
660
91.3
894.8
902
124.6
1222
1" - 14
250
34.6
338.9
660
91.3
849.8
 
 
 
979
135
1327
 * Values based on clean and dry threads. Reduce values by 10% if threads are oiled.

Example: 30 ft.-lbs. X .10 = 3 ft-lbs.  Oiled value of 27 ft.-lbs. should be used.

To convert: Ft.-lbs to in.-lbs: 30 ft.-lbs x 12= 360 in.-lbs
                  Ft.-lbs to NM: 30 ft.-lbs x 1.3556= 40.668 NM
                         Ft.-lbs to kgm: 30 ft.-lbs x .138185525= 4.146 kgm