外螺纹公差等级表,螺纹公差等级标准表

基本直径

内螺纹公差等级

外螺纹公差

大径

中径

小径

6H

7H

6g

中径公差

小径公差

中径公0,差

小径公差

中径公差

小径公差

M10*1

10

9.35

8.917

0, 0.150

0, 0.236

0, 0.190

0, 0.300

-0.026,-0.138

-0.026,0.206

M12*1

12

11.35

10.917

0, 0.160

0, 0.236

0, 0.200

0, 0.300

-0.026,-0.144

-0.026,0.206

M14*1

14

13.35

122.917

0, 0.160

0, 0.236

0, 0.200

0, 0.300

-0.026,-0.144

-0.026,0.206

M12*1.25

12

11.188

10.647

0, 0.180

0, 0.265

0, 0.224

0, 0.335

-0.028,-0.160

-0.028,-0.240

M14*1.25

14

13.188

12.647

0, 0.180

0, 0.265

0, 0.224

0, 0.335

-0.028,-0.160

-0.028,-0.240

M12*1.5

12

11.026

10.376

0, 0.190

0, 0.300

0, 0.236

0, 0.375

-0.032,-0.172

-0.032,-0.268

M14*1.5

14

13.026

12.376

0, 0.190

0, 0.300

0, 0.236

0, 0.375

-0.032,-0.172

-0.032,-0.268

M16*1.5

16

15.026

14.376

0, 0.190

0, 0.300

0, 0.236

0, 0.375

-0.032,-0.172

-0.032,-0.268

M18*1.5

18

17.026

16.376

0, 0.190

0, 0.300

0, 0.236

0, 0.375

-0.032,-0.172

-0.032,-0.268

M20*1.5

20

19.026

18.376

0, 0.190

0, 0.300

0, 0.236

0, 0.375

-0.032,-0.172

-0.032,-0.268

M22*1.5

22

21.026

20.376

0, 0.190

0, 0.300

0, 0.236

0, 0.375

-0.032,-0.172

-0.032,-0.268

M24*1.5

14

23.026

22.376

0, 0.200

0, 0.300

0, 0.250

0, 0.375

-0.032,-0.182

-0.032,-0.268

M26*1.5

26

25.026

24.376

0, 0.200

0, 0.300

0, 0.250

0, 0.375

-0.032,-0.182

-0.032,-0.268

M27*1.5

27

26.026

25.376

0, 0.200

0, 0.300

0, 0.250

0, 0.375

-0.032,-0.182

-0.032,-0.268

M30*1.5

30

29.026

28.376

0, 0.200

0, 0.300

0, 0.250

0, 0.375

-0.032,-0.182

-0.032,-0.268

M33*1.5

33

32.026

31.376

0, 0.200

0, 0.300

0, 0.250

0, 0.375

-0.032,-0.182

-0.032,-0.268

M36*1.5

36

35.026

34.376

0, 0.200

0, 0.300

0, 0.250

0, 0.375

-0.032,-0.182

-0.032,-0.268

M39*1.5

39

38.026

37.376

0, 0.200

0, 0.300

0, 0.250

0, 0.375

-0.032,-0.182

-0.032,-0.268

M42*1.5

42

41.026

40.376

0, 0.200

0, 0.300

0, 0.250

0, 0.375

-0.032,-0.182

-0.032,-0.268

M27*2

27

25.701

24.835

0, 0.224

0, 0.375

0, 0.280

0, 0.475

-0.038,-0.208

-0.038,-0.318

M30*2

30

28.701

27.835

0, 0.224

0, 0.375

0, 0.280

0, 0.475

-0.038,-0.208

-0.038,-0.318

M33*2

33

31.701

30.835

0, 0.224

0, 0.375

0, 0.280

0, 0.475

-0.038,-0.208

-0.038,-0.318

M36*2

36

34.701

33.835

0, 0.224

0, 0.375

0, 0.280

0, 0.475

-0.038,-0.208

-0.038,-0.318

M39*2

39

37.701

36.835

0, 0.224

0, 0.375

0, 0.280

0, 0.475

-0.038,-0.208

-0.038,-0.318

M42*2

42

40.701

39.835

0, 0.224

0, 0.375

0, 0.280

0, 0.475

-0.038,-0.208

-0.038,-0.318

M45*2

45

43.701

42.835

0, 0.224

0, 0.375

0, 0.280

0, 0.475

-0.038,-0.208

-0.038,-0.318

M52*2

52

50.701

49.835

0, 0.236

0, 0.375

0, 0.300

0, 0.475

-0.038,-0.218

-0.038,-0.318

M60*2

60

58.701

57.835

0, 0.236

0, 0.375

0, 0.300

0, 0.475

-0.038,-0.218

-0.038,-0.318

M64*2

64

62.701

61.835

0, 0.236

0, 0.375

0, 0.300

0, 0.475

-0.038,-0.218

-0.038,-0.318

M72*2

72

70.701

69.835

0, 0.236

0, 0.375

0, 0.300

0, 0.475

-0.038,-0.218

-0.038,-0.318

标号

螺纹代号

外螺纹（2A级）

内螺纹（2B级）

大径

中径

小径

中径

最大值

最小值

最大值

最小值

最小值

最大值

最小值

最大值

02

1/8-27NPSM

10.084

9.906

9.462

9.370

9.093

9.246

9.489

9.609

04

1/4-18NPSM

13.360

13.132

12.454

12.342

11.887

12.217

12.487

12.634

06

3/8-18NPSM

16.815

16.586

15.890

15.776

15.316

15.545

15.926

16.076

08

1/2-14NPSM

20.904

20.650

19.733

19.604

18.974

19.279

19.771

19.942

12

3/4-14NPSM

26.264

26.010

25.077

24.943

24.333

24.638

25.118

25.293

16

1-11.5NPSM

32.842

32.537

31.417

31.270

30.505

30.759

31.460

31.653

20

1.1/4-11.5NPSM

41.605

41.300

40.173

40.020

39.268

39.497

40.218

40.416

24

1.1/2-11.5NPSM

47.676

47.371

46.241

46.086

45.339

45.568

46.286

46.487

32

2-11.5NPSM

59.715

59.411

58.278

58.120

57.379

57.607

58.326

58.532

40

2.1/2-8NPSM

72.161

71.780

70.104

69.916

68.783

69.266

70.160

70.409

48

3-8NPSM

88.062

87.681

86.009

85.816

84.684

85.166

86.068

86.319

标号

螺纹代号

基面上的直径

螺纹长度

端面大径

大径

中径

小径

管端至基面长

有效长度

02

Z1/8*27

10.242

9.489

8.736

4.102

6.703

9.986

04

Z1/4*18

13.616

12.487

11.385

5.786

10.206

13.254

06

Z3/8*18

17.055

15.926

14.797

6.096

10.358

16.674

08

Z1/2*14

21.223

19.772

18.321

8.128

13.556

20.715

12

Z3/4*14

26.568

25.117

23.666

8.611

13.861

26.030

16

Z1*11.5

33.228

31.461

29.694

10.160

17.343

32.593

20

Z1.1/4*1.5

41.985

40.218

38.451

10.668

17.953

41.318

24

Z1.1/2*11.5

48.054

46.287

44.520

10.668

18.377

47.387

32

Z2*11.5

60.092

58.325

56.558

11.074

19.215

59.400

40

Z2.1/2*8

72.699

70.159

67.619

17.323

28.892

71.616

48

Z3*8

88.608

86.068

83.528

19.456

30.480

87.392

标号

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

公差等级

A

B

中径公差

大径公差

中径公差

大径公差

02

G1/8*28

9.728

9.147

8.566

0.170，0

0.282，0

0，-0.170

0，-0.214

0，-0.214

0，-0.214

04

G1/4*19

13.157

12.301

11.445

0.125，0

0.445，0

0.-0.125

0，-0.250

0，-0.250

0，-0.250

06

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

08

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

10

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

12

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

16

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

20

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

24

G1.1/2*11

47.803

46.324

44.845

0.180，0

0.640，0

0，-0.180

0，-0.360

0，-0.360

0，-0.360

32

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

40

G2.1/2*11

75.184

73.705

72.226

0.217，0

0.640，0

0，-0.217

0，-0.434

0，-0.434

0，-0.434

48

G3*11

87.884

86.405

84.926

0.217，0

0.640，0

0，-0.217

0，-0.434

0，-0.434

0，-0.434

标号

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的极限偏差

端面大径

大径

中径

小径

基本

最大

最小

基本

最大

最小

02

R1/8*28

9.728

9.147

8.566

4

4.9

3.1

6.5

7.4

5.6

1.1

9.478

04

R1/4*19

13.157

12.301

11.445

6

7.3

4.7

9.7

11

8.4

1.7

12.782

06

R3/8*19

16.662

15.806

14.950

6.4

7.7

5.1

10.1

11.4

8.8

1.7

16.262

08

R1/2*14

20.955

19.793

18.631

8.2

10

6.4

13.2

15

11.4

2.3

20.443

12

R3/4*14

26.441

25.279

24.117

9.5

11.3

7.7

14.5

16.3

12.7

2.3

25.847

16

R1*11

33.249

31.770

30.291

10.4

12.7

8.1

16.8

19.1

14.5

2.9

32.599

20

R1.1/4*11

41.910

40.431

38.952

12.7

15

10.4

19.1

21.4

16.8

2.9

41.116

24

R1.1/2*11

47.803

46.324

44.845

12.7

15

10.4

19.1

21.4

16.8

2.9

47.009

32

R2*11

59.614

58.135

56.656

15.9

18.2

13.6

23.4

25.7

21.1

2.9

58.620

40

R2.1/2*11

75.184

73.705

72.226

17.5

21

14

26.7

30.2

23.2

3.5

74.090

48

R3*11

87.884

86.405

84.926

20.6

24.1

17.1

29.8

33.3

26.3

3.5

86.597

标号

螺纹代号

外螺纹

内螺纹

公差等级2A

公差等级2B

大径

中径

小径

最大

小径

中径

大径

最小

最大

最小

最大

最小

最小

最大

最小

最大

JIC螺纹

02

5/16×24UNF

7.910

7.727

7.221

7.127

6.650

6.782

7.036

7.249

7.371

7.938

03

3/8*24UNF

9.497

9.314

8.809

8.712

8.237

8.382

8.636

8.837

8.961

9.525

04

7/16*20UNF

11.079

10.874

10.254

10.147

9.568

9.728

10.033

10.287

10.424

11.113

05

1/2*20UNF

12.667

12.461

11.841

11.732

11.156

11.328

11.608

11.875

12.017

12.7

06

9/16*18UNF

14.252

14.031

13.335

13.221

12.573

12.751

13.081

13.371

13.52

14.288

08

3/4*16UNF

19.012

18.773

17.981

17.854

17.12

17.323

17.678

18.019

18.184

19.05

10

7/8*14UNF

22.184

21.923

21.006

20.869

20.025

20.269

20.676

21.046

21.224

22.225

12

1.1/16*12UNF

26.944

26.655

25.57

25.425

24.425

24.689

25.146

25.613

25.801

26.988

16

1.5/16*12UNF

33.294

33.005

31.92

31.773

30.775

31.039

31.496

31.963

32.154

33.338

20

1.5/8*12UNF

41.229

40.94

39.855

39.705

38.71

38.989

39.446

39.901

40.094

41.275

24

1.7/8*12UNF

47.579

47.29

46.205

46.053

45.06

45.339

45.796

46.251

46.449

47.625

32

2.1/2*12UNF

63.452

63.162

62.078

61.92

60.932

61.214

61.671

62.126

62.332

63.5

40

3812UNF

76.157

75.862

74.778

74.618

73.632

73.914

74.371

74.826

75.034

76.2

18HK

1.1/2*10UNF

38.052

37.724

36.401

36.238

35.029

35.357

35.890

36.449

36.660

38.100

ORFS螺纹

04

9/16*18UNF

14.252

14.031

13.335

13.221

12.573

12.751

13.081

13.371

13.52

14.288

06

11/16*16UNF

17.427

17.188

16.396

16.274

15.535

15.748

16.104

16.431

16.589

17.463

08

13/16*16UNF

20.599

20.361

19.568

19.444

18.707

18.923

19.279

19.606

19.766

20.638

10

1*14UNSF

25.357

25.095

24.178

24.036

23.195

23.444

23.825

24.221

24.407

25.4

12

1.3/16*12UN

30.119

29.83

28.754

28.598

27.6

27.864

28.321

28.788

28.979

30.163

16

1.7/16*12UN

36.467

36.177

35.093

34.943

33.947

34.214

34.671

35.138

35.331

36.513

20

1.11/16*12UN

42.817

42.527

41.443

41.29

40.297

40.564

41.021

41.488

41.686

42.863

24

2*12UN

50.754

50.465

49.38

49.25

48.235

48.514

48.971

49.426

49.627

50.8

SAE螺纹

06

5/8×18UNF

15.839

15.618

14.923

14.803

14.161

14.351

14.681

14.958

15.11

15.875

12

1.1/16*14UNF

26.947

26.683

25.743

25.608

24.74

24.968

25.375

25.783

25.961

26.987

其他美制螺纹

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

软管编号

螺纹代号

外螺纹

内螺纹

公差等级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

R5-04

9/32*32

7.120

6.967

6.604

6.523

6.175

6.294

6.472

6.629

6.736

7.145

R5-05

46/127*28

9.197

9.032

8.608

8.516

8.115

8.234

8.463

8.636

8.753

9.225

R5-06

107/254*28

10.685

10.520

10.095

10.004

9.603

9.735

9.938

10.123

10.240

10.713

R5-08

9/16*24

14.257

14.074

13.569

13.470

12.997

13.132

13.386

13.599

13.729

14.288

R5-10

11/16*24

17.432

17.249

16.744

16.642

16.172

16.307

16.561

16.774

16.906

17.463

R5-12

13/16*20

20.599

20.399

19.779

19.667

19.347

19.253

19.558

19.812

19.982

20.638

R5-16

1.1/16*18

26.952

26.731

26.035

25.916

25.273

25.451

25.781

26.071

26.228

26.988

R5-20

1.5/16*18

33.299

33.078

32.382

32.258

31.620

31.801

32.131

32.421

32.581

33.338

R5-24

1.9/16*18

39.649

39.428

38.732

38.605

37.970

38.151

38.481

38.771

38.936

39.688

R5-32

2*18

50.762

50.541

49.845

49.715

49.083

49.276

49.606

49.883

50.053

50.800

2A-04

7/16*20

11.079

10.874

10.254

10.147

9.568

9.728

10.033

10.287

10.424

11.113

2A-06

9/16*18

14.252

14.031

13.335

13.221

12.573

12.751

13.081

13.371

13.520

14.288

2A-08

5/8*18

15.839

15.618

14.923

14.803

14.161

14.351

14.681

14.958

15.110

15.875

2A-10

3/4*18

19.014

18.793

18.098

17.981

17.336

17.526

17.856

18.133

18.285

19.050

2A-12

7/8*18

22.189

21.968

21.273

21.156

20.511

20.701

21.031

21.308

21.460

22.225

2A-16

1.3/16*16

30.124

29.870

29.093

28.964

28.232

28.448

28.804

29.131

29.299

30.163

2A-20

1.9/16*18

39.649

39.428

38.732

38.605

37.970

38.151

38.481

38.771

38.936

39.688

标号

你螺纹代号

大径MIN

中径MIN

中径MAX

小径MIN

小径MAX

B-09

0.860in*14

21.844

20.683

20.841

19.522

标号

螺纹代号

外螺纹小端中径

外螺纹大端中径

外螺纹小端大径最小

外螺纹小端大径最大

外螺纹全牙长度

内螺纹大端中径

内螺纹小端中径

内螺纹大端小径最小

内螺纹大端小径最大

内螺纹全牙长度

2

1/8-27NPTF

9.233

9.652

9.871

9.960

6.703

9.489

9.058

8.763

8.851

6.924

4

1/4-18NPTF

12.126

12.764

13.128

13.215

10.206

12.487

11.862

11.398

11.486

10.020

6

3/8-18NPTF

15.545

16.193

16.547

16.634

10.358

15.926

15.281

14.837

14.924

10.330

8

1/2-14NPTF

19.264

20.111

20.616

20.703

13.556

19.772

18.926

18.333

18.420

13.571

12

3/4-14NPTF

24.579

25.445

25.931

26.018

13.861

25.117

24.239

23.678

23.768

14.054

16

1-11.5NPTF

30.826

31.910

32.474

32.562

17.343

31.461

30.411

29.725

29.813

16.787

20

1.1/4-11.5NPTF

39.551

40.673

41.199

41.287

17.953

40.218

39.136

38.482

38.570

17.295

24

1.1/2-11.5NPTF

45.621

46.769

47.269

47.357

18.377

46.287

45.207

44.551

44.640

17.295

32

2-11.5NPTF

57.633

58.834

59.281

59.369

19.215

58.325

57.219

56.589

56.677

17.701

40

2.1/2-8NPTF

69.076

70.882

71.476

71.559

28.893

70.159

68.481

67.676

67.759

26.848

48

3-8NPTF

84.852

86.757

87.252

87.335

30.480

86.068

84.257

83.585

83.668

28.981