Hex Coupling Nuts

Nom. Size & Threads Per Inch

Basic Major

Dia. Of Thrd.

F

G

H

Width Across Flats

Width Across Corners

Length

Basic

Max.

Min.

Max.

Min.

Basic

Max.

Min

8-32

.1640

5/16

.312

.302

.361

.344

5/8

.64

.61

10-24

.1900

5/16

.312

.302

.361

.344

3/4

.76

.74

10-32

.1900

5/16

.312

.302

.361

.344

3/4

.76

.74

1/4-20

.2500

3/8

.375

.365

.433

.416

7/8

.89

.86

1/4-28

.2500

3/8

.375

.365

.433

.416

7/8

.89

.86

5/16-18

.3125

1/2

.500

.489

.577

.557

7/8

.89

.86

5/16-18

.3125

1/2

.500

.489

.577

.557

1-1/8

1.13

1.11

5/16-24

.3125

7/16

.438

.428

.505

.488

7/8

.89

.86

3/8-16

.3750

1/2

.500

.489

.577

.557

1-1/8

1.13

1.11

3/8-16

.3750

9/16

.562

.551

.650

.628

1-3/4

1.76

1.73

3/8-24

.3750

1/2

.500

.489

.577

.557

1-1/8

1.13

1.11

1/2-13

.5000

11/16

.688

.663

.794

.756

1-3/4

1.76

1.73

1/2-20

.5000

5/8

.625

.613

.722

.698

1-1/4

1.26

1.24

5/8-11

.6250

13/16

.813

.782

.939

.891

2-1/8

2.14

2.10

3/4-10

.7500

1”

1.000

.963

1.155

1.097

2-1/4

2.27

2.22

7/8-9

.8750

1-1/4

1.250

1.212

1.443

1.382

2-1/2

2.53

2.47

1-8

1.0000

1-3/8

1.375

1.325

1.588

1.511

2-3/4

2.78

2.72