公称直径

d

d

s

k

b

max

min

max

min

max

min

L≤6

L>6

3/8

0.388

0.36

0.688

0.669

0.268

0.226

1

1.25

1/2

0.515

0.482

0.875

0.85

0.364

0.302

1.25

1.5

5/8

0.642

0.605

1.062

1.031

0.444

0.378

1.5

1.75

3/4

0.768

0.729

1.25

1.212

0.524

0.455

1.75

2

7/8

0.895

0.852

1.438

1.394

0.604

0.531

2

2.25

1

1.022

0.976

1.625

1.575

0.7

0.591

2.25

2.5

1-1/8

1.149

1.098

1.812

1.756

0.78

0.658

2.5

2.75

1-1/4

1.277

1.223

2

1.938

0.864

0.749

2.75

3

1-3/8

1.404

1.345

2.188

2.119

0.94

0.81

3

3.25

1-1/2

1.531

1.47

2.375

2.3

1.036

0.902

3.25

3.5

1-5/8

1.658

1.591

2.562

2.481

1.116

0.978

3.5

3.75

1-3/4

1.785

1.716

2.75

2.662

1.196

1.054

3.75

4

1-7/8

1.912

1.839

2.938

2.844

1.276

1.13

4

4.25

2

2.039

1.964

3.125

3.025

1.388

1.175

4.25

4.5

2-1/4

2.305

2.214

3.5

3.388

1.548

1.327

/

5

2-1/2

2.559

2.461

3.875

3.75

1.708

1.479

/

5.5

2-3/4

2.827

2.711

4.25

4.112

1.869

1.632

/

6

3

3.081

2.961

4.625

4.475

2.06

1.815

/

6.5