Hex Flange Nuts                                 IFI 1986

Nominal Size

Width Across Flats(F)

Width Across Corners

Flange Diameter(B)

Nut Thickness(H)

Wrench-ing Length

Flange Thick-ness

Max

Min

Max

Min

Max

Min

Max

Min

Min

Min

#6

.312

.302

.361

.342

.422

.406

.171

.156

.10

.02

#8

.344

.334

.397

.381

.469

.452

.203

.187

.13

.02

#10

.375

.365

.433

.416

.500

.480

.219

.203

.13

.03

#12

.438

.428

.505

.488

.594

.574

.236

.222

.14

.04

1/4

.438

.428

.505

.488

.594

.574

.236

.222

.14

.04

5/16

.500

.489

.577

.557

.680

.660

.283

.268

.17

.04

3/8

.562

.551

.650

.628

.750

.728

.347

.330

.23

.04

7/16

.688

.675

.794

.768

.937

.910

.395

.375

.26

.04

1/2

.750

.736

.866

.840

1.031

1.000

.458

.437

.31

.05

9/16

.875

.861

1.010

.982

1.188

1.155

.506

.483

.35

.05

5/8

.938

.922

1.083

1.051

1.281

1.248

.569

.545

.40

.05

3/4

1.125

1.088

1.299

1.240

1.500

1.460

.675

.627

.46

.06