螺纹基本尺寸对照表文档格式.docx

螺纹基本尺寸对照表文档格式.docx

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20.955

19.793

18.631

-0.142

-0.284

G5/8″

22.911

21.749

20.587

G3/4″

26.441

25.279

24.117

+0.180

+0.640

G1″×

11

33.249

31.770

30.291

-0.180

-0.360

G1.1/4″

41.910

40.431

38.952

G1.1/2″

47.803

46.324

44.854

G2″×

59.614

58.135

56.656

+0.217

G2.1/2

”X11

75.184

73.705

72.226

-0.217

-0.434

G3”

X11

87.884

86.405

84.926

G3.1/2

100.330

98.851

97.372

英制锥管螺纹基本尺寸及公差（牙形角55o）BSPT

基面上的直径

基准长度

有效螺纹长度

圆锥内螺纹基面轴向位移偏差（±

mm）

基本

最大

最小

R1/8″×

4.0

4.9

3.1

6.5

7.4

5.6

1.1

R1/4″×

6.0

7.3

4.7

9.7

11.0

8.4

1.7

R3/8″×

6.4

7.7

5.1

10.1

11.4

8.8

R1/2″×

8.2

10.0

13.2

15.0

2.3

R3/4″×

9.5

11.3

14.5

16.3

12.7

R1″×

10.4

8.1

16.8

19.1

2.9

R1.1/4″×

21.4

R1.1/2″×

44.845

R2″×

15.9

18.2

13.6

23.4

25.7

21.1

R2.1/2”X11

17.5

21.0

14.0

26.7

30.2

23.2

3.5

R3”X11

20.6

24.1

17.1

29.8

33.3

26.3

R3.1/2”X11

22.2

18.7

31.4

34.9

27.9

美制管螺纹基本尺寸及公差（牙形角60o）UN（F）

公差等级

2A

2B

JIC螺纹

7/16″×

20UNF

11.079

10.874

10.254

10.147

9.568

10.033

10.287

10.424

11.113

1/2″×

12.667

12.461

11.841

11.732

11.156

11.328

11.608

11.875

12.017

9/16″×

18UNF

14.252

14.031

13.335

13.221

12.573

12.751

13.081

13.371

13.52

14.288

3/4″×

16UNF

19.012

18.773

17.981

17.854

17.12

17.323

17.678

18.019

18.184

19.05

7/8″×

14UNF

22.184

21.923

21.006

20.869

20.025

20.269

20.676

21.046

21.224

22.225

1-1/16″×

12UN

26.944

26.655

25.57

25.425

24.425

24.689

25.146

25.613

25.801

26.988

1-5/16″×

33.294

33.005

31.92

31.773

30.775

31.039

31.496

31.963

32.154

33.338

1-5/8″×

41.229

40.94

39.885

39.705

38.71

38.989

39.446

39.901

40.094

41.275

1-7/8″×

47.579

47.29

46.205

46.053

45.06

45.339

45.796

46.251

46.449

47.625

2-1/2″×

63.452

63.162

62.078

61.92

60.932

61.214

61.671

62.126

62.332

63.5

ORFS螺纹

11/16″×

16UN

17.427

17.188

16.396

16.274

15.535

15.748

16.104

16.431

16.589

17.463

13/16″×

20.599

20.361

19.568

19.444

18.707

18.923

19.279

19.606

19.766

20.638

1″×

25.357

25.095

24.178

24.036

23.195

23.444

23.825

24.221

24.407

25.4

1-3/16″×

30.119

29.83

28.745

28.598

27.6

27.864

28.321

28.788

28.979

30.163

1-7/16″×

36.467

36.177

35.093

34.943

33.947

34.214

34.671

35.138

35.331

36.513

1-11/16″×

42.817

42.527

41.443

41.29

40.297

40.564

41.021

41.488

41.686

42.863

2″×

50.754

50.465

49.38

49.225

48.235

48.514

48.971

49.426

49.627

50.8

SAE螺纹

5/8″×

15.839

15.618

14.923

14.803

14.161

14.351

14.681

14.958

15.11

15.875

14UN

26.947

26.683

25.743

25.608

24.74

24.968

25.375

25.783

25.961

26.987

其它美制螺纹

14.013

13.101

12.36

12.929

13.256

13.411

22.182

21.892

20.808

20.668

19.662

19.939

20.396

20.851

21.034

2-1/4″×

57.104

56.815

55.73

55.575

54.585

54.864

55.321

55.776

55.976

57.1