螺纹尺寸公差.docx

螺纹尺寸公差.docx

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螺纹尺寸公差

日期:

M米制粗牙螺纹基本牙型与尺寸和公差带

H二琴P=0.866025F

Hi=-|=H=0.br3F

H2=^H=Q,61343Pd2=D2=d-0.51952Pdi=d-2H=d-1.22687Prw丨=[■.11434-

6

V

、、7

—X虻

z/X^/

代号（大径）

d=D

螺距

P

螺纹中径

d2=D2

外螺纹小径

d1

内螺纹小径

D1

外螺纹

全齿高

H2

配合齿高

H1

螺纹中径尺寸

（6H公差带级别）

丝锥螺纹中径

（H2公差带级别为例）

min

max

min

max

M3

0.5

2.672

2.387

2.459

0.307

0.271

2.675

2.775

2.699

2.714

M3.5

0.6

3.110

2.764

2.850

0.368

0.325

3.110

3.222

3.137

3.155

M4

0.7

3.545

3.141

3.242

0.429

0.379

3.545

3.663

3.574

3.593

M5

0.8

4.480

4.019

4.134

0.491

0.433

4.480

4.605

4.510

5.530

M6

1.0

5.350

4.773

4.937

0.613

0.541

5.350

5.500

5.385

5.408

M7

1.0

6.350

5.773

5.937

0.613

0.541

6.350

6.500

6.385

6.408

M8

1.25

7.188

6.466

6.647

0.767

0.677

7.188

7.348

7.226

7.251

M10

1.5

9.026

8.160

8.376

0.920

0.812

9.026

9.206

9.068

9.096

M12

1.75

10.863

9.853

10.106

1.074

0.947

10.863

11.063

10.911

10.943

M14

2.0

12.701

11.546

11.835

1.227

1.083

12.701

12.913

12.752

12.786

M16

2.0

14.701

13.546

13.835

1.227

1.083

14.701

14.913

14.752

14.786

M18

2.5

16.373

14.933

15.294

1.534

1.353

16.376

16.600

16.430

16.466

M20

2.5

18.376

16.933

17.294

1.534

1.353

18.376

18.600

18.430

18.466

M22

2.5

20.376

18.933

19.294

1.534

1.353

20.376

20.600

20.430

20.466

代号（大径）

d=D

螺距

P

螺纹中径

d2=D2

外螺纹小径

d1

内螺纹小径

D1

外螺纹

全齿高

H2

配合齿高

H1

螺纹中径尺寸

（6H公差带级别）

丝锥螺纹中径

（H2公差带级别为例）

min

max

min

max

M3

0.35

2.773

2.571

2.621

0.215

0.189

2.773

2.863

2.794

2.809

M3.5

0.35

2.273

3.071

3.121

0.215

0.189

3.273

3.363

3.294

3.309

M4

0.5

3.675

3.387

3.459

0.307

0.271

3.675

3.775

3.699

3.714

M5

0.5

4.675

4.387

4.459

0.307

0.271

4.675

4.775

4.699

4.714

M6

0.75

5.513

5.080

5.188

0.460

0.406

5.513

5.645

5.545

5.566

M8

1.0

7.350

6.773

6.917

0.613

0.541

7.350

7.500

7.385

7.408

M10

1.0

9.350

8.773

8.917

0.613

0.541

9.350

9.500

9.385

9.408

M10

1.25

9.188

8.466

8.647

0.767

0.677

9.188

9.348

9.226

9.251

M12

1.25

11.188

10.466

10.647

0.767

0.677

11.188

11.368

11.226

11.251

M12

1.5

11.026

10.160

10.376

0.920

0.812

11.026

11.216

11.068

11.096

M14

1.5

13.026

12.160

12.376

0.920

0.812

13.026

13.216

13.068

13.096

M16

1.5

15.026

14.160

14.376

0.920

0.812

15.026

15.216

15.068

15.096

M18

1.5

17.026

16.160

16.376

0.920

0.812

17.026

17.216

17.068

17.096

M18

2.0

16.701

15.546

15.835

1.227

1.083

16.701

16.913

16.752

16.786

M20

1.5

19.026

18.160

18.376

0.920

0.812

19.026

19.216

19.068

19.096

M20

2.0

18.701

17.546

17.835

1.227

1.083

18.701

18.913

18.752

18.786

M22

1.5

21.026

20.160

20.376

0.920

0.812

21.026

21.216

21.068

21.096

M22

2.0

20.701

19.546

19.835

1.227

1.083

20.701

20.913

20.752

20.786

H二琴卩=0.866C25P

UNC统一粗牙螺纹基本牙型与尺寸和公差带

代号

（螺纹直径一

25.4m内牙数）

螺距

P

螺纹大径

d=D

螺纹中径

d2=D2

内螺纹小径

D1

外螺纹小径

d1

螺纹中径尺寸

丝锥螺纹中径

2B3B

min

2Bmax

3Bmax

min

max

NO.5—40

0.635

3.175

2.746

2.487

2.395

2.764

2.847

2.827

2.776

2.789

NO.6—32

0.794

3.505

2.990

2.647

2.532

2.990

3.084

3.058

3.105

3.028

NO.8—32

0.794

4.166

3.650

3.307

3.193

3.650

3.746

3.721

3.675

3.688

NO.10—24

1.058

4.826

4.138

3.680

3.528

4.138

4.247

4.219

4.963

4.176

NO.12—24

1.058

5.486

4.798

4.341

4.188

4.798

4.910

4.882

4.823

4.836

UNC1/4"-20

1.270

6.350

5.524

4.976

4.793

5.524

5.646

5.616

5.575

5.588

UNC5/16"-18

1.411

7.938

7.021

6.411

6.205

7.021

7.155

7.120

7.071

7.084

UNC3/8"-16

1.588

9.525

8.494

7.805

7.577

8.494

8.639

8.603

8.545

8.557

UNC7/16"-14

1.814

11.112

9.934

9.149

8.887

9.934

10.089

10.051

9.985

9.997

UNC1/2"-13

1.954

12.700

11.430

10.584

10.302

11.430

11.595

11.552

11.481

11.494

UNC9/16"-12

2.117

14.288

12.913

11.996

11.692

12.913

13.086

13.043

12.964

12.977

UNC5/8"-11

2.309

15.875

14.376

13.376

13.043

14.376

14.559

14.514

14.427

14.440

UNC3/4"-10

2.540

19.050

17.399

16.229

15.933

17.399

17.595

17.544

17.450

17.463

UNC7/8"-9

2.822

22.225

20.390

19.169

18.763

20.391

20.599

20.546

20.455

20.467

UNC1"-8

3.175

25.400

23.338

21.963

21.504

23.338

23.561

23.505

23.401

23.414

代号

（螺纹直径一

25.4m内牙数）

螺距

P

螺纹大径

d=D

螺纹中径

d2=D2

内螺纹小径

D1

外螺纹小径

d1

螺纹中径尺寸

丝锥螺纹中径（2

级）

2B3B

min

2Bmax

3Bmax

min

max

NO.5—44

0.577

3.175

2.799

2.550

2.466

2.799

2.880

2.860

2.812

2.824

NO.6—40

0.635

3.505

3.094

2.817

2.725

3.094

3.180

3.157

3.108

3.119

NO.8—36

0.706

4.166

3.708

3.401

3.299

3.708

3.800

3.777

3.721

3.734

NO.10—32

0.794

4.826

4.310

3.976

3.853

4.310

4.409

4.384

4.336

4.348

NO.12—28

0.907

5.486

4.897

4.503

4.37