Heavy Hex Nuts and Heavy Hex Jam Nuts              ASNI/ASME 18.2.2

1986

Nominal Size

Width Across Flats(F)

Width Across Corners(G)

Thickness

Heavy Hex Nuts(H)

Thickness Heavy Hex Jam Nuts(H)

Basic

Max

Min

Max

Min

Basic

Max

Min

Basic

Max

Min

1/4

1/2

.500

.488

.577

.556

15/64

.250

.218

11/64

.188

.156

5/16

9/16

.562

.546

.650

.622

19/64

.314

.280

13/64

.220

.186

3/8

11/16

.688

.669

.794

.763

23/64

.377

.341

15/64

.252

.216

7/16

3/4

.750

.728

.866

.830

27/64

.441

.403

17/64

.285

.247

1/2

7/8

.875

.850

1.010

.969

31/64

.504

.464

19/64

.317

.277

9/16

15/16

.938

.909

1.083

1.037

35/64

.568

.526

21/64

.349

.307

5/8

1-1/16

1.062

1.031

1.227

1.175

39/64

.631

.587

23/64

.381

.337

3/4

1-1/4

1.250

1.212

1.443

1.382

47/64

.758

.710

27/64

.446

.398

7/8

1-7/16

1.438

1.394

1.660

1.589

55/64

.885

.833

31/64

.510

.458

1

1-5/8

1.625

1.575

1.876

1.796

63/64

1.012

.956

35/64

.575

.519

1-1/8

1-13/16

1.812

1.756

2.093

2.002

1-7/64

1.139

1.079

39/64

.639

.579

1-1/4

2

2.000

1.938

2.309

2.209

1-7/32

1.251

1.187

23/32

.751

.687