2级和3级标准系列统一螺纹的容隙和公差 in

2级和3级标准系列统一螺纹的容隙和公差               in

公称

直径

牙数

n

系列

代号

2A外螺纹容隙

es

外螺纹

大径

公差

中径公差

内螺纹小径公差

2A

2B

3A

3B

2B

3B

0

80

UNF

0.0005

0.0032

0.001762

0.0023

0.0013

0.0017

0.0049

0.0049

1

64

UNC

0.0006

0.0038

0.001970

0.0026

0.0015

0.0019

0.0061

0.0061

1

72

UNF

0.0006

0.0035

0.001899

0.0025

0.0014

0.0019

0.0054

0.0054

2

56

UNC

0.0006

0.0041

0.002127

0.0028

0.0016

0.0021

0.0070

0.0070

2

64

UNF

0.0006

0.0038

0.002040

0.0027

0.0015

0.0020

0.0061

0.0061

3

48

UNC

0.0007

0.0045

0.002302

0.0030

0.0017

0.0022

0.0081

0.0081

3

56

UNF

0.0007

0.0041

0.002191

0.0028

0.0016

0.0021

0.0068

0.0068

4

40

UNC

0.0008

0.0051

0.002507

0.0033

0.0019

0.0024

0.0090

0.0090

4

48

UNF

0.0007

0.0045

0.002361

0.0031

0.0018

0.0023

0.0074

0.0074

5

40

UNC

0.0008

0.0051

0.002562

0.0033

0.0019

0.0025

0.0083

0.0083

5

44

UNF

0.0007

0.0048

0.002484

0.0032

0.0019

0.0024

0.0075

0.0075

6

32

UNC

0.0008

0.0060

0.002820

0.0037

0.0021

0.0027

0.0098

0.0097

6

40

UNF

0.0008

0.0051

0.002614

0.0034

0.0020

0.0025

0.0077

0.0077

8

32

UNC

0.0009

0.0060

0.002916

0.0038

0.0022

0.0028

0.0087

0.0086

8

36

UNF

0.0008

0.0055

0.002804

0.0036

0.0021

0.0027

0.0077

0.0077

10

24

UNC

0.0010

0.0072

0.003319

0.0043

0.0025

0.0032

0.0106

0.0106

10

32

UNF

0.0009

0.0060

0.003004

0.0039

0.0023

0.0029

0.0079

0.0079

12

24

UNC

0.0010

0.0072

0.003400

0.0044

0.0026

0.0033

0.0098

0.0098

12

28

UNF

0.0010

0.0065

0.003224

0.0042

0.0024

0.0031

0.0084

0.0084

12

32

UNEF

0.0010

0.0060

0.003183

0.0041

0.0024

0.0031

0.0074

0.0073

1/4

20

UNC

0.0011

0.0081

0.003731

0.0049

0.0028

0.0036

0.0115

0.0108

1/4

28

UNF

0.0010

0.0065

0.003322

0.0043

0.0025

0.0032

0.0084

0.0077

1/4

32

UNEF

0.0010

0.0060

0.003228

0.0042

0.0024

0.0031

0.0074

0.0067

5/16

18

UNC

0.0012

0.0087

0.004041

0.0053

0.0030

0.0039

0.0127

0.0106

5/16

20

UN

0.0012

0.0081

0.004060

0.0053

0.0030

0.0040

0.0115

0.0096

5/16

24

UNF

0.0011

0.0072

0.003660

0.0048

0.0027

0.0036

0.0097

0.0080

5/16

28

UN

0.0010

0.0065

0.003495

0.0045

0.0026

0.0034

0.0084

0.0069

5/16

32

UNEF

0.0010

0.0060

0.003301

0.0043

0.0025

0.0032

0.0074

0.0059

3/8

16

UNC

0.0013

0.0094

0.004363

0.0057

0.0033

0.0043

0.0141

0.0109

3/8

20

UN

0.0012

0.0081

0.004124

0.0054

0.0031

0.0040

0.0115

0.0088

3/8

24

UNF

0.0011

0.0072

0.003804

0.0049

0.0029

0.0037

0.0097

0.0073

3/8

28

UN

0.0011

0.0065

0.003559

0.0046

0.0027

0.0035

0.0084

0.0063

3/8

32

UNEF

0.0010

0.0060

0.003365

0.0044

0.0025

0.0033

0.0074

0.0057

7/16

14

UNC

0.0014

0.0103

0.004713

0.0061

0.0035

0.0046

0.0158

0.0115

7/16

16

UN

0.0014

0.0094

0.004626

0.0060

0.0035

0.0045

0.0141

0.0102

7/16

20

UNF

0.0013

0.0081

0.004167

0.0054

0.0031

0.0041

0.0115

0.0082

7/16

28

UN

0.0011

0.0065

0.003616

0.0047

0.0027

0.0035

0.0084

0.0063

7/16

32

UNEF

0.0010

0.0060

0.003422

0.0044

0.0026

0.0033

0.0074

0.0057

1/2

13

UNC

0.0015

0.0109

0.004965

0.0065

0.0037

0.0048

0.0169

0.0117

1/2

16

UN

0.0014

0.0094

0.004678

0.0061

0.0035

0.0046

0.0141

0.0097

1/2

20

UNF

0.0013

0.0081

0.004288

0.0056

0.0032

0.0042

0.0115

0.0078

1/2

28

UNEF

0.0011

0.0065

0.003668

0.0048

0.0028

0.0036

0.0084

0.0063

1/2

32

UN

0.0010

0.0060

0.003474

0.0045

0.0026

0.0034

0.0074

0.0057

9/16

12

UNC

0.0016

0.0114

0.005225

0.0068

0.0039

0.0051

0.0181

0.0120

9/16

16

UN

0.0014

0.0094

0.004725

0.0061

0.0035

0.0046

0.0141

0.0093

9/16

18

UNF

0.0014

0.0087

0.004547

0.0059

0.0034

0.0044

0.0127

0.0082

9/16

20

UN

0.0013

0.0081

0.004280

0.0056

0.0032

0.0042

0.0115

0.0077

9/16

24

UNEF

0.0012

0.0072

0.003960

0.0051

0.0030

0.0039

0.0097

0.0070

9/16

28

UN

0.0011

0.0065

0.003715

0.0048

0.0028

0.0036

0.0084

0.0063

9/16

32

UN

0.0011

0.0060

0.003521

0.0046

0.0026

0.0034

0.0074

0.0057

5/8

11

UNC

0.0017

0.0121

0.005501

0.0072

0.0041

0.0054

0.0194

0.0125

5/8

12

UN

0.0016

0.0114

0.005443

0.0071

0.0041

0.0053

0.0181

0.0115

5/8

16

UN

0.0014

0.0094

0.004769

0.0062

0.0036

0.0046

0.0141

0.0089

5/8

18

UNF

0.0014

0.0087

0.004652

0.0060

0.0035

0.0045

0.0127

0.0081

5/8

20

UN

0.0013

0.0081

0.004324

0.0056

0.0032

0.0042

0.0115

0.0077

5/8

24

UNEF

0.0012

0.0072

0.004004

0.0052

0.0030

0.0039

0.0097

0.0070

5/8

28

UN

0.0011

0.0065

0.003759

0.0049

0.0028

0.0037

0.0084

0.0063

5/8

32

UN

0.0011

0.0060

0.003565

0.0046

0.0027

0.0035

0.0074

0.0057

11/16

12

UN

0.0016

0.0114

0.005485

0.0071

0.0041

0.0053

0.0181

0.0112

11/16

16

UN

0.0014

0.0094

0.004811

0.0063

0.0036

0.0047

0.0141

0.0086

11/16

20

UN

0.0013

0.0081

0.004366

0.0057

0.0033

0.0043

0.0115

0.0077

11/16

24

UNEF

0.0012

0.0072

0.004046

0.0053

0.0030

0.0039

0.0097

0.0070

11/16

28

UN

0.0011

0.0065

0.003801

0.0049

0.0029

0.0037

0.0084

0.0063

11/16

32

UN

0.0011

0.0060

0.003607

0.0047

0.0027

0.0035

0.0074

0.0057

3/4

10

UNC

0.0018

0.0129

0.005894

0.0077

0.0044

0.0057

0.0210

0.0128

3/4

12

UN

0.0017

0.0114

0.005524

0.0072

0.0041

0.0054

0.0181

0.0109

3/4

16

UNF

0.0015

0.0094

0.005024

0.0065

0.0038

0.0049

0.0141

0.0086

3/4

20

UNEF

0.0013

0.0081

0.004405

0.0057

0.0033

0.0043

0.0115

0.0077

3/4

28

UN

0.0012

0.0065

0.003840

0.0050

0.0029

0.0037

.00084

0.0063

3/4

32

UN

0.0011

0.0060

0.003646

0.0047

0.0027

0.0036

0.0074

0.0057

13/16

12

UN

0.0017

0.0114

0.005561

0.0072

0.0042

0.0054

0.0181

0.0106

13/16

16

UN

0.0015

0.0094

0.004887

0.0064

0.0037

0.0048

0.0141

0.0086

13/16

20

UNEF

0.0013

0.0081

0.004442

0.0058

0.0033

0.0043

0.0115

0.0077

13/16

28

UN

0.0012

0.0065

0.003877

0.0050

0.0029

0.0038

0.0084

0.0063

13/16

32

UN

0.0011

0.0060

0.003683

0.0048

0.0028

0.0036

0.0074

0.0057

7/8

9

UNC

0.0019

0.0139

0.006305

0.0082

0.0047

0.0061

0.0228

0.0134

7/8

12

UN

0.0017

0.0114

0.005596

0.0073

0.0042

0.0055

0.0181

0.0104

7/8

14

UNF

0.0016

0.0103

0.005420

0.0070

0.0041

0.0053

0.0158

0.0090

7/8

16

UN

0.0015

0.0094

0.004922

0.0064

0.0037

0.0048

0.0141

0.0086

7/8

20

UNEF

0.0013

0.0081

0.004477

0.0058

0.0034

0.0044

0.0115

0.0077

7/8

28

UN

0.0012

0.0065

0.003912

0.0051

0.0029

0.0038

0.0084

0.0063

7/8

32

UN

0.0011

0.0060

0.003718

0.0048

0.0028

0.0036

0.0074

0.0057

15/16

12

UN

0.0017

0.0114

0.005629

0.0073

0.0042

0.0055

0.0181

0.0102

15/16

16

UN

0.0015

0.0094

0.004955

0.0064

0.0037

0.0048

0.0141

0.0086

15/16

20

UNEF

0.0014

0.0081

0.004510

0.0059

0.0034

0.0044

0.0115

0.0077

15/16

28

UN

0.0012

0.0065

0.003945

0.0051

0.0030

0.0038

0.0084

0.0063

15/16

32

UN

0.0011

0.0060

0.003751

0.0049

0.0028

0.0037

0.0074

0.0057

1

8

UNC

0.0020

0.0150

0.006750

0.0088

0.0051

0.0066

0.0250

0.0150

1

12

UNF

0.0018

0.0114

0.005862

0.0076

0.0044

0.0057

0.0181

0.0100

1

16

UN

0.0015

0.0094

0.004987

0.0065

0.0037

0.0049

0.0141

0.0086

1

20

UNEF

0.0014

0.0081

0.004542

0.0059

0.0034

0.0044

0.0115

0.0077

1

28

UN

0.0012

0.0065

0.003977

0.0052

0.0030

0.0039

0.0084

0.0063

1

32

UN

0.0011

0.0060

0.003783

0.0049

0.0028

0.0037

0.0074

0.0057

11/16

8

UN

0.0020

0.0150

0.006827

0.0089

0.0051

0.0067

0.0250

0.0150

11/16

12

UN

0.0017

0.0114

0.005692

0.0074

0.0043

0.0055

0.0181

0.0100

11/16

16

UN

0.0015

0.0094

0.005018

0.0065

0.0038

0.0049

0.0141

0.0086

11/16

18

UNEF

0.0014

0.0087

0.004776

0.0062

0.0036

0.0047

0.0127

0.0081

11/16

20

UN

0.0014

0.0081

0.004573

0.0059

0.0034

0.0045

0.0115

0.0077

11/16

28

UN

0.0012

0.0065

0.004008

0.0052

0.0030

0.0039

0.0084

0.0063

11/8

7

UNC

0.0022

0.0164

0.007250

0.0094

0.0054

0.0071

0.0276

0.0171

11/8

8

UN

0.0021

0.0150

0.006901

0.0090

0.0052

0.0067

0.0250

0.0150

11/8

12

UNF

0.0018

0.0114

0.006013

0.0078

0.0045

0.0059

0.0181

0.0100

11/8

16

UN

0.0015

0.0094

0.005047

0.0066

0.0038

0.0049

0.0141

0.0086

11/8

18

UNEF

0.0014

0.0087

0.004805

0.0062

0.0036

0.0047

0.0127

0.0081

11/8

20

UN

0.0014

0.0081

0.004602

0.0060

0.0035

0.0045

0.0115

0.0077

11/8

28

UN

0.0012

0.0065

0.004037

0.0052

0.0030

0.0039

0.0084

0.0063

13/16

8

UN

0.0021

0.0150

0.006973

0.0091

0.0052

0.0068

0.0250

0.0150

13/16

12

UN

0.0017

0.0114

0.005749

0.0075

0.0043

0.0056

0.0181

0.0100

13/16

16

UN

0.0015

0.0094

0.005075

0.0066

0.0038

0.0049

0.0141

0.0086

13/16

18

UNEF

0.0014

0.0087

0.004833

0.0063

0.0036

0.0047

0.0127

0.0081

13/16

20

UN

0.0014

0.0081

0.004630

0.0060

0.0035

0.0045

0.0115

0.0077

13/16

28

UN

0.0012

0.0065

0.004065

0.0053

0.0030

0.0040

0.0084

0.0063

11/4

7

UNC

0.0022

0.0164

0.007392

0.0096

0.0055

0.0072

0.0276

0.0171

11/4

8

UN

0.0021

0.0150

0.007043

0.0092

0.0053

0.0069

0.0250

0.0150

11/4

12

UNF

0.0018

0.0114

0.006155

0.0080

0.0046

0.0060

0.0181

0.0100

11/4

16

UN

0.0015

0.0094

0.005103

0.0066

0.0038

0.0050

0.0141

0.0086

11/4

18

UNEF

0.0015

0.0087

0.004861

0.0063

0.0036

0.0047

0.0127

0.0081

11/4

20

UN

0.0014

0.0081

0.004658

0.0061

0.0035

0.0045

0.0115

0.0077

11/4

28

UN

0.0012

0.0065

0.004093

0.0053

0.0031

0.0040

0.0084

0.0063

15/16

8

UN

0.0021

0.0150

0.007110

0.0092

0.0053

0.0069

0.0250

0.0150

15/16

12

UN

0.0017

0.0114

0.005803

0.0075

0.0044

0.0057

0.0181

0.0100

15/16

16

UN

0.0015

0.0094

0.005129

0.0067

0.0038

0.0050

0.0141

0.0086

15/16

18

UNEF

0.0015

0.0087

0.004887

0.0064

0.0037

0.0048

0.0127

0.0081

15/16

20

UN

0.0014

0.0081

0.004684

0.0061

0.0035

0.0046

0.0115

0.0077

15/16

28

UN

0.0012

0.0065

0.004119

0.0054

0.0031

0.0040

0.0084

0.0063

13/8

6

UNC

0.0024

0.0082

0.007970

0.0104

0.0060

0.0078

0.0306

0.0200

13/8

8

UN

0.0022

0.0150

0.007177

0.0093

0.0054

0.0070

0.0250

0.0150

13/8

12

UNF

0.0019

0.0114

0.006289

0.0082

0.0047

0.0061

0.0181

0.0100

13/8

16

UN

0.0015

0.0094

0.005155

0.0067

0.0039

0.0050

0.0141

0.0086

13/8

18

UNEF

0.0015

0.0087

0.004913

0.0064

0.0037

0.0048

0.0127

0.0081

13/8

20

UN

0.0014

0.0081

0.004710

0.0061

0.0035

0.0046

0.0115

0.0077

13/8

28

UN

0.0012

0.0065

0.004145

0.0054

0.0031

0.0040

0.0084

0.0063

17/16

6

UN

0.0024

0.0082

0.008034

0.0104

0.0060

0.0078

0.0306

0.0200

17/16

8

UN

0.0022

0.0150

0.007241

0.0094

0.0054

0.0071

0.0250

0.0150

17/16

12

UN

0.0018

0.0114

0.005854

0.0076

0.0044

0.0057

0.0181

0.0100

17/16

16

UN

0.0016

0.0094

0.005180

0.0067

0.0039

0.0051

0.0141

0.0086

17/16

18

UNEF

0.0015

0.0087

0.004938

0.0064

0.0037

0.0048

0.0127

0.0081

17/16

20

UN

0.0014

0.0081

0.004735

0.0062

0.0036

0.0046

0.0115

0.0077

17/16

28

UN

0.0013

0.0065

0.004170

0.0054

0.0031

0.0041

0.0084

0.0063

注:1.内螺纹大径最大可延伸至H/24削平高度处;

2.外螺纹小径最小可延伸至H/8削平高度处。