Hex Coupling Nuts                                      IFI 128

                                                                                                                                                       1986

Nominal Size

Width Across Flats(F)

Width Across Corners(G)

Thickness(H)

Basic

Max

Min

Max

Min

Basic

Max

Min

1/4

3/8

.375

.365

.433

.416

3/4

.76

.74

5/16

1/2

.500

.489

.577

.557

15/16

.95

.93

3/8

9/16

.562

.551

.650

.628

1-1/8

1.13

1.11

7/16

11/16

.688

.675

.794

.769

1-5/16

1.32

1.30

1/2

3/4

.750

.736

.866

.839

1-1/2

1.51

1.49

9/16

7/8

.875

.861

1.010

.981

1-11/16

1.70

1.67

5/8

15/16

.938

.922

1.083

1.051

1-7/8

1.89

1.86

3/4

1-1/8

1.125

1.088

1.299

1.240

2-1/4

2.27

2.22

7/8

1-5/16

1.312

1.269

1.516

1.447

2-5/8

2.65

2.60

1

1-1/2

1.500

1.450

1.732

1.653

3

3.03

2.97

1-1/8

1-11/16

1.688

1.631

1.949

1.859

3-3/8

3.40

3.34

1-1/4

1-7/8

1.875

1.812

2.165

2.066

3-3/4

3.78

3.71