Bolt Size
(in.)

Coarse 
Threads/ inch

Standard Dry Torque in Foot-Pounds

SAE 
Grade 
0-1-2
74,000 psi
Low Carbon
Steel

SAE 
Grade 3
100,000 psi
Med. Carbon
Steel

SAE 
Grade 5
120,000 psi
Med. Carbon
Heat T. Steel

SAE 
Grade 6
133,000 psi
Med. Carbon
Temp. Steel

SAE 
Grade 7
133,000 psi
Med. Carbon
Alloy Steel

SAE 
Grade 8
150,000 psi
Med. Carbon
Alloy Steel

1/4

20

6

9

10

12.5

13

14

5/16

18

12

17

19

24

25

29

3/8

16

20

30

33

43

44

47

7/16

14

32

47

54

69

71

78

1/2

13

47

69

78

106

110

119

9/16

12

69

103

114

150

154

169

5/8

11

96

145

154

209

215

230

3/4

10

155

234

257

350

360

380

7/8

9

206

372

382

550

570

600

1

8

310

551

587

825

840

700

1-1/8

7

480

872

794

1304

1325

1430

1-1/4

7

375

1211

1105

1815

1825

1975

1-3/8

6

900

1624

1500

2434

2500

2650

1-1/2

6

1100

1943

1775

2913

3000

3200

1-5/8

5.5

1470

2660

2425

3985

4000

4400

1-3/4

5

1900

3463

3150

5189

5300

5650

1-7/8

5

2360

4695

4200

6980

7000

7600

2

4.5

2750

5427

4550

7491

7500

8200