HEX FULL NUT (IMPERIAL) – ANSI B18.2.2 / BS1768

 DIA

A/F

A/C

T

Basic

Max

Min

Max

Min

Basic

Max

Min

1/4

7/16

0.438

0.428

0.505

0.488

7/32

0.226

0.212

5/16

1/2

0.500

0.489

0.577

0.557

17/64

0.273

0.258

3/8

9/16

0.562

0.551

0.650

0.628

21/64

0.337

0.320

7/16

11/16

0.688

0.675

0.794

0.768

3/8

0.385

0.365

1/2

3/4

0.750

0.736

0.866

0.840

7/16

0.448

0.427

9/16

7/8

0.875

0.861

1.010

0.982

31/64

0.496

0.473

5/8

1.5/16

0.938

0.922

1.083

1.051

35/64

0.559

0.535

3/4

1.1/8

1.125

1.088

1.299

1.240

41/64

0.665

0.617

7/8

1.5/16

1.312

1.269

1.516

1.447

3/4

0.776

0.724

1

1.1/2

1.500

1.450

1.732

1.653

55/64

0.887

0.831

1-1/8

1.11/16

1.688

1.631

1.949

1.859

31/32

0.999

0.939

1/1/4

1.7/8

1.875

1.812

2.165

2.066

1.1/6

1.094

1.030

1-3/8

2.1/16

2.062

1.994

2.382

2.273

1.11/64

1.206

1.138

1-1/2

2.1/4

2.250

2.175

2.598

2.480

1.9/32

1.317

1.245

1-5/8

2.7/16

2.438

2.356

2.185

2.686

1.25/64

1.429

1.353

1-3/4

2.5/8

2.625

2.558

3.031

2.893

1.1/2

1.540

1.460

2

3

3.000

2.900

3.464

3.306

1.23/32

1.763

1.675

2-1/4

3.3/8

3.375

3.236

3.897

3.719

1.15/16

1.986

1.890

2-1/2

3.3/4

3.750

3.625

4.330

4.133

2.5/32

2.209

2.105

2-3/4

4.1/8

4.125

3.988

4.763

4.546

2.3/8

2.431

2.319