螺纹基本尺寸对照表.docx

螺纹基本尺寸对照表.docx

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螺纹基本尺寸对照表

英制管螺纹基本尺寸及公差（牙形角55º）BSPP

螺纹代号

基本直径

内螺纹

外螺纹

大径

中径

小径

中径公差

小径公差

A级

B级

中径公差

大径公差

中径公差

大径公差

G1/8″×28

9.728

9.147

8.566

+0.170

+0.282

0

0

-0.107

0

-0.214

0

-0.214

0

-0.214

G1/4″×19

13.157

12.301

11.445

+0.125

+0.445

-0.125

-0.250

-0.250

0-0.250

G3/8″×19

16.662

15.806

14.950

+0.125

0

+0.445

0

0

-0.125

0

-0.250

0

-0.250

0

-0.250

G1/2″×14

20.955

19.793

18.631

+0.142

0

+0.541

0

0

-0.142

0

-0.284

0

-0.284

0

-0.284

G5/8″×14

22.911

21.749

20.587

+0.142

0

+0.541

0

0

-0.142

0

-0.284

0

-0.284

0

-0.284

G3/4″×14

26.441

25.279

24.117

+0.142

0

+0.541

0

0

-0.142

0

-0.284

0

-0.284

0

-0.284

G1″×11

33.249

31.770

30.291

+0.180

0

+0.640

0

0

-0.180

0

-0.360

0

-0.360

0

-0.360

G1.1/4″×11

41.910

40.431

38.952

+0.180

0

+0.640

0

0

-0.180

0

-0.360

0

-0.360

0

-0.360

G1.1/2″×11

47.803

46.324

44.854

+0.180

0

+0.640

0

0

-0.180

0

-0.360

0

-0.360

0

-0.360

G2″×11

59.614

58.135

56.656

+0.180

0

+0.640

0

0

-0.180

0

-0.360

0

-0.360

0

-0.360

G2.1/2”X11

75.184

73.705

72.226

+0.217

0

+0.640

0

0

-0.217

0

-0.434

0

-0.434

0

-0.434

G3”X11

87.884

86.405

84.926

+0.217

0

+0.640

0

0

-0.217

0

-0.434

0

-0.434

0

-0.434

G3.1/2”X11

100.330

98.851

97.372

+0.217

0

+0.640

0

0

-0.217

0

-0.434

0

-0.434

0

-0.434

英制锥管螺纹基本尺寸及公差（牙形角55º）BSPT

螺纹代号

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）

大径

中径

小径

基本

最大

最小

基本

最大

最小

R1/8″×28

9.728

9.147

8.566

4.0

4.9

3.1

6.5

7.4

5.6

1.1

R1/4″×19

13.157

12.301

11.445

6.0

7.3

4.7

9.7

11.0

8.4

1.7

R3/8″×19

16.662

15.806

14.950

6.4

7.7

5.1

10.1

11.4

8.8

1.7

R1/2″×14

20.955

19.793

18.631

8.2

10.0

6.4

13.2

15.0

11.4

2.3

R3/4″×14

26.441

25.279

24.117

9.5

11.3

7.7

14.5

16.3

12.7

2.3

R1″×11

33.249

31.770

30.291

10.4

12.7

8.1

16.8

19.1

14.5

2.9

R1.1/4″×11

41.910

40.431

38.952

12.7

15.0

10.4

19.1

21.4

16.8

2.9

R1.1/2″×11

47.803

46.324

44.845

12.7

15.0

10.4

19.1

21.4

16.8

2.9

R2″×11

59.614

58.135

56.656

15.9

18.2

13.6

23.4

25.7

21.1

2.9

R2.1/2”X11

75.184

73.705

72.226

17.5

21.0

14.0

26.7

30.2

23.2

3.5

R3”X11

87.884

86.405

84.926

20.6

24.1

17.1

29.8

33.3

26.3

3.5

R3.1/2”X11

100.330

98.851

97.372

22.2

25.7

18.7

31.4

34.9

27.9

3.5

美制管螺纹基本尺寸及公差（牙形角60º）UN（F）

螺纹代号

外螺纹

内螺纹

公差等级

公差等级

2A

2B

大径

中径

小径

小径

中径

大径

最大

最小

最大

最小

最小

最大

最小

最大

JIC螺纹

7/16″×20UNF

11.079

10.874

10.254

10.147

9.568

9.728

10.033

10.287

10.424

11.113

1/2″×20UNF

12.667

12.461

11.841

11.732

11.156

11.328

11.608

11.875

12.017

12.7

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″×12UN

33.294

33.005

31.92

31.773

30.775

31.039

31.496

31.963

32.154

33.338

1-5/8″×12UN

41.229

40.94

39.885

39.705

38.71

38.989

39.446

39.901

40.094

41.275

1-7/8″×12UN

47.579

47.29

46.205

46.053

45.06

45.339

45.796

46.251

46.449

47.625

2-1/2″×12UN

63.452

63.162

62.078

61.92

60.932

61.214

61.671

62.126

62.332

63.5

ORFS螺纹

9/16″×18UNF

14.252

14.031

13.335

13.221

12.573

12.751

13.081

13.371

13.52

14.288

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″×16UN

20.599

20.361

19.568

19.444

18.707

18.923

19.279

19.606

19.766

20.638

1″×14UNF

25.357

25.095

24.178

24.036

23.195

23.444

23.825

24.221

24.407

25.4

1-3/16″×12UN

30.119

29.83

28.745

28.598

27.6

27.864

28.321

28.788

28.979

30.163

1-7/16″×12UN

36.467

36.177

35.093

34.943

33.947

34.214

34.671

35.138

35.331

36.513

1-11/16″×12UN

42.817

42.527

41.443

41.29

40.297

40.564

41.021

41.488

41.686

42.863

2″×12UN

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″×18UNF

15.839

15.618

14.923

14.803

14.161

14.351

14.681

14.958

15.11

15.875

1-1/16″×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

9/16″×16UN

14.252

14.013

13.221

13.101

12.36

12.573

12.929

13.256

13.411

14.288

7/8″×12UN

22.182

21.892

20.808

20.668

19.662

19.939

20.396

20.851

21.034

22.225

2-1/4″×12UN

57.104

56.815

55.73

55.575

54.585

54.864

55.321

55.776

55.976

57.15

注：

UNC粗牙螺纹系列，UNF细牙螺纹系列，UNEF超细牙螺纹系列，UN不变螺距系列

布锥管螺纹基本尺寸及公差（牙形角60º）NPT

螺纹代号

基面上的直径

螺纹长度

大径

中径

小径

有效长度

管端至基面长

Z1/8″×27

10.272

9.519

8.766

7

4.572

Z1/4″×18

13.572

12.443

11.314

9.5

5.080

Z3/8″×18

17.055

15.926

14.797

10.5

6.096

Z1/2″×14

21.223

19.772

18.321

13.5

8.028

Z3/4″×14

26.568

25.117

23.666

14

8.611

Z1″×11.5

33.228

31.461

29.694

17.5

10.160

Z1.1/4″×11.5

41.985

40.218

38.451

18

10.688

Z1.1/2″×11.5

48.054

46.287

44.520

18.5

10.688

Z2″×11.5

60.092

58.325

56.558

19

11.074

公制螺纹基本尺寸及公差（牙形角60º）M

螺纹代号

基本直径

内螺纹

外螺纹

大径

中径

小径

公差等级

公差等级

6H

7H

6g

中径公差

小径公差

中径公差

小径公差

中径公差

大径公差

M10X1

10

9.350

8.917

+0.150

0

+0.236

0

+0.190

0

+0.300

0

-0.026

-0.138

-0.026

-0.206

M12X1

12

11.350

10.917

+0.160

0

+0.236

0

+0.200

0

+0.300

0

-0.026

-0.144

-0.026

-0.206

M14X1

14

13.350

12.917

+0.160

0

+0.236

0

+0.200

0

+0.300

0

-0.026

-0.144

-0.026

-0.206

M12X1.25

12

11.188

10.647

+0.180

0

+0.265

0

+0.224

0

+0.335

0

-0.028

-0.160

-0.028

-0.240

M14X1.25

14

13.188

12.647

+0.180

0

+0.265

0

+0.224

0

+0.335

0

-0.028

-0.160

-0.028

-0.240

M12X1.5

12

11.026

10.376

+0.190

0

+0.300

0

+0.236

0

+0.375

0

-0.032

-0.172

-0.032

-0.268

M14X1.5

14

13.026

12.376

+0.190

0

+0.300

0

+0.236

0

+0.375

0

-0.032

-0.172

-0.032

-0.268

M16X1.5

16

15.026

14.376

+0.190

0

+0.300

0

+0.236

0

+0.375

0

-0.032

-0.172

-0.032

-0.268

M18X1.5

18

17.026

16.373

+0.190

0

+0.300

0

+0.236

0

+0.375

0

-0.032

-0.172

-0.032

-0.268

M20X1.5

20

19.026

18.376

+0.190

0

+0.300

0

+0.236

0

+0.375

0

-0.032

-0.172

-0.032

-0.268

M22X1.5

22

21.026

20.376

+0.190

0

+0.300

0

+0.236

0

+0.375

0

-0.032

-0.172

-0.032

-0.268

M24X1.5

24

23.026

22.376

+0.200

0

+0.300

0

+0.250

0

+0.375

0

-0.032

-0.182

-0.032

-0.268

M26X1.5

26

25.026

24.376

+0.200

0

+0.300

0

+0.250

0

+0.375

0

-0.032

-0.182

-0.032

-0.268

M27X1.5

27

26.026

25.376

+0.200

0

+0.300

0

+0.250

0

+0.375

0

-0.032

-0.182

-0.032

-0.268

M30X1.5

30

29.026

28.376

+0.200

0

+0.300

0

+0.250

0

+0.375

0

-0.032

-0.182

-0.032

-0.268

M33X1.5

33

32.026

31.376

+0.200

0

+0.300

0

+0.250

0

+0.375

0

-0.032

-0.182

-0.032

-0.268

M36X1.5

36

35.026

34.376

+0.200

0

+0.300

0

+0.250

0

+0.375

0

-0.032

-0.182

-0.032

-0.268

M39X1.5

39

38.026

37.376

+0.200

0

+0.300

0

+0.250

0

+0.375

0

-0.032

-0.182

-0.032

-0.268

M42X1.5

42

41.026

40.376

+0.200

0

+0.300

0

+0.250

0

+0.375

0

-0.032

-0.182

-0.032

-0.268

M27X2

27

25.701

24.835

+0.224

0

+0.375

0

+0.280

0

+0.475

0

-0.038

-0.208

-0.038

-0.318

M30X2

30

28.701

27.835

+0.224

0

+0.375

0

+0.280

0

+0.475

0

-0.038

-0.208

-0.038

-0.318

M33X2

33

31.701

30.835

+0.224

0

+0.375

0

+0.280

0

+0.475

0

-0.038

-0.208

-0.038

-0.318

M36X2

36

34.701

33.835

+0.224

0

+0.375

0

+0.280

0

+0.475

0

-0.038

-0.208

-0.038

-0.318

M39X2

39

37.701

36.835

+0.224

0

+0.375

0

+0.280

0

+0.475

0

-0.038

-0.208

-0.038

-0.318

M42X2

42

40.701

39.835

+0.224

0

+0.375

0

+0.280

0

+0.475

0

-0.038

-0.208

-0.038

-0.318

M45X2

45

43.701

42.835

+0.224

0

+0.375

0

+0.280

0

+0.475

0

-0.038

-0.208

-0.038

-0.318

M52X2

52

50.701

49.835

+0.236

0

+0.375

0

+0.300

0

+0.475

0

-0.038

-0.218

-0.038

-0.318

M60X2

60

58.701

57.835

+0.236

0

+0.375

0

+0.300

0

+0.475

0

-0.038

-0.218

-0.038

-0.318

M64X2

64

62.701

61.835

+0.236

0

+0.375

0

+0.300

0

+0.475

0

-0.038

-0.218

-0.038

-0.318

M72X2

72

70.701

69.835

+0.236

0

+0.375

0

+0.300

0

+0.475

0

-0.038

-0.218

-0.038

-0.318

55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达

55°圆锥管螺纹基本尺寸对照表最新下载-汇兴达

55°圆锥管螺纹（BSPT）

螺纹代号

基本尺寸

英寸

大径mm

d=D

螺距mm

p

每英寸牙数

tpi

中径mm

d2=D2

小径

外螺纹

d3

牙型高度

H1

圆弧尺寸

r

底孔尺寸

mm

R1/16

1/16"

7.723

0.907

28

7.142

6.561

0.581

0.125

6.4

R1/8

1/8"

9.728

0.907

28

9.147

8.566

0.581

0.125

8.4

R1/4

1/4"

13.157

1.337

19

12.301

11.445

0.856

0.184

11.2

R3/8

3/8"

16.662

1.337

19

15.806

14.950

0.856

0.184

14.75

R1/2

1/2"

20.955

1.814

14

19.793

18.631

1.162

0.249

18.25

R3/4

3/4"

26.441

1.814

14

25.279

24.117

1.162

0.249

23.75

R1

1"

33.249

2.309

11

31.77

30.291

1.479

0.317

30

R11/4

11/4"

41.910

2.309

11

40.431

38.952

1.479

0.317

38.5

R11/2

11/2"

47.803

2.309

11

46.324

44.845

1.479

0.317

44.5

R2

2"

59.614

2.309

11

58.135

56.656

1.479

0.317

56

R21/2

21/2"

75.184

2.309

11

73.705

72.226

1.479

0.317

71

R3

3"

87.884

2.309

11

86.405

84.926

1.479

0.317

85.5

R4

4"

113.030

2.309

11

111.551

110.072

1.479

0.317

110.5

R5

5"

138.430

2.309

11

136.951

135.472

1.479

0.317

136

R6

6"

163.830

2.309

11

162.351

160.872

1.479

0.317

161.5

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