Nominal Size, Inches

F

G

H

T

S

Width Across Flats

Width Across Corners

Thickness

Unslotted Thickness

Slot Width

Max

Min

Max

Min

Max

Min

Max

Min

Max

Min

.25

.438

.428

.505

.488

.226

.212

.14

.12

.10

.07

.3125

.500

.489

.577

.557

.273

.258

.18

.16

.12

.09

.375

.562

.551

.650

.628

.337

.320

.21

.19

.15

.12

.4375

.688

.675

.794

.768

.385

.365

.23

.21

.15

.12

.50

.750

.736

.866

.840

.448

.427

.29

.27

.18

.15

.5625

.875

.861

1.010

.982

.496

.473

.31

.29

.18

.15

.625

.938

.922

1.083

1.051

.559

.535

.34

.32

.24

.18

.75

1.125

1.088

1.299

1.240

.665

.617

.40

.38

.24

.18

.875

1.312

1.269

1.516

1.447

.776

.724

.52

.49

.24

.18

1.00

1.500

1.450

1.732

1.653

.887

.831

.59

.56

.30

.24

1.125

1.688

1.631

1.949

1.859

.999

.939

.64

.61

.33

.24

1.25

1.875

1.812

2.165

2.066

1.094

1.030

.70

.67

.40

.31

1.375

2.062

1.994

2.382

2.273

1.206

1.138

.82

.78

.40

.31

1.50

2.250

2.175

2.598

2.480

1.317

1.245

.86

.82

.46

.37