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Micron mesh
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Micron to mesh to inch to millimeter conversion tables

Enquries to aqua@ecotao.co.za 

Micron mesh tables

Use the below tables to convert between micron, mesh, millimeter and inch units.

A mesh could have a specification such as “POLYESTER  65/37”. This would be a 65 micron square hole and a 37 micron strand width making the mesh screen.

micron-mesh1

micron-mesh2

Another version

micron-mesh3

 

 

Micron

U.S. Mesh

Inches

2000

10

0.0787

1680

12

0.0661

1410

14

0.0555

1190

16

0.0469

1000

18

0.0394

841

20

0.0331

707

25

0.028

595

30

0.0232

500

35

0.0197

420

40

0.0165

354

45

0.0138

297

50

0.0117

250

60

0.0098

210

70

0.0083

177

80

0.007

149

100

0.0059

125

120

0.0049

105

140

0.0041

88

170

0.0035

74

200

0.0029

63

230

0.0024

53

270

0.0021

44

325

0.0017

37

400

0.0015

 

Typical wire diameters:

 

"Alternate" designations are derived from ASTM specification E-11-95

Sieve Designation

Nominal Sieve Opening

Nominal Wire Diameter

Suggested Screen

Standard

Alternate

mm

inches

mm

inches

 

125 mm

5"

125

4.921"

8

0.3149

5" OP

106 mm

4.24"

106

4.173"

6.4

0.2519

4-1/4" OP

100 mm

4"

100

3.937"

6.3

0.248

4" OP

90 mm

3-1/2"

90

3.543"

6.08

0.2393

3-1/2" OP

75 mm

3"

75

2.952"

5.8

0.2283

3" OP

63 mm

2-1/2"

63

2.480"

5.5

0.2165

2-1/2" OP

53 mm

2.12"

53

2.086"

5.15

0.2027

2-1/8" OP

50 mm

2"

50

1.968"

5.05

0.1988

2" OP

 

Sieve Designation

Nominal Sieve Opening

Nominal Wire Diameter

Suggested Screen

Standard

Alternate

mm

inches

mm

inches

 

45 mm

1-3/4"

45

1.771"

4.85

0.1909

1-3/4" OP

37.5 mm

1-1/2"

37.5

1.476"

4.59

0.1807

1-1/2" OP

31.5 mm

1-1/4"

31.5

1.240"

4.23

0.1665

1-1/4" OP

26.5 mm

1.06"

26.5

1.043"

3.9

0.1535

1-1/16" OP

25.0 mm

1"

25

0.984"

3.8

0.1496

1" OP

22.4 mm

7/8"

22.4

0.881"

3.5

0.1377

7/8" OP

19.0 mm

3/4"

19

0.748"

3.3

0.1299

3/4" OP

16.0 mm

5/8"

16

0.629"

3

0.1181

5/8" OP

 

Sieve Designation

Nominal Sieve Opening

Nominal Wire Diameter

Suggested Screen

Standard

Alternate

mm

inches

mm

inches

 

13.2 mm

.530"

13.2

0.519"

2.75

0.1082

17/32" OP

12.5 mm

1/2" **

12.5

0.492"

2.67

0.1051

1/2" OP

11.2 mm

7/16"

11.2

0.440"

2.45

0.0964

7/16" OP

9.5 mm

3/8"

9.5

0.374"

2.27

0.0893

3/8" OP

8.0 mm

5/16"

8

0.314"

2.07

0.0814

2-1/2 Mesh

6.7 mm

.265"

6.7

0.263"

1.87

0.0736

3 Mesh

6.3 mm

1/4" **

6.3

0.248"

1.82

0.0716

3-1/4 Mesh

5.6 mm

No. 3-1/2

5.6

0.220"

1.68

0.0661

3-1/2 Mesh

  **These sieve specifications are not in the standard series, they are included due to popular usage.  

 

Sieve Designation

Nominal Sieve Opening

Nominal Wire Diameter

Suggested Screen

Standard

Alternate

mm

inches

mm

inches

 

4.75 mm

No. 4

4.75

0.187"

1.54

0.0606

4 Mesh

4.0 mm

No. 5

4

0.157"

1.37

0.0539

5 Mesh

3.35 mm

No. 6

3.35

0.131"

1.23

0.0484

6 Mesh

2.80 mm

No. 7

2.8

0.131"

1.1

0.0433

7 Mesh

2.36 mm

No. 8

2.36

0.093"

1

0.0393

8 Mesh

2.00 mm

No. 10

2

0.078"

0.9

0.0354

9 Mesh

1.70 mm

No. 12

1.7

0.066"

0.81

0.0318

10 Mesh

1.40 mm

No. 14

1.4

0.055"

0.72

0.0285

12 Mesh

 

 

Sieve Designation

Nominal Sieve Opening

Nominal Wire Diameter

Suggested Screen

Standard

Alternate

mm

inches

mm

inches

 

1.18 mm

No. 16

1.18

0.0464"

0.65

0.0255

14 Mesh

1.00 mm

No. 18

1

0.0393"

0.58

0.0228

16 Mesh

850 Ám

No. 20

0.85

0.0334"

0.51

0.02

20 Mesh

710 Ám

No. 25

0.71

0.0279"

0.45

0.0177

24 Mesh

600 Ám

No. 30

0.6

0.0236"

0.39

0.0153

28 Mesh

500 Ám

No. 35

0.5

0.0196"

0.34

0.0133

32 Mesh

425 Ám

No. 40

0.425

0.0167"

0.29

0.0114

35 Mesh

355 Ám

No. 45

0.355

0.0139"

0.247

0.0097

42 Mesh

Sieve Designation

Nominal Sieve Opening

Nominal Wire Diameter

Suggested Screen

Standard

Alternate

mm

inches

mm

inches

 

300 Ám

No. 50

0.3

0.0118"

0.215

0.0084

48 Mesh

250 Ám

No. 60

0.25

0.0098"

0.18

0.007

60 Mesh

212 Ám

No. 70

0.212

0.0083"

0.152

0.0059

65 Mesh

180 Ám

No. 80

0.18

0.0070"

0.131

0.0051

80 Mesh

150 Ám

No. 100

0.15

0.0059"

0.11

0.0043

100 Mesh

125 Ám

No. 120

0.125

0.0049"

0.091

0.0035

115 Mesh

106 Ám

No. 140

0.106

0.0041"

0.076

0.0029

100 Mesh

90 Ám

No. 170

0.09

0.0035"

0.064

0.0025

170 Mesh

 

 

 

 

 

 

 

Sieve Designation

Nominal Sieve Opening

Nominal Wire Diameter

Suggested Screen

Standard

Alternate

mm

inches

mm

inches

 

75 Ám

No. 200

0.075

0.0029"

0.053

0.002

200 Mesh

63 Ám

No. 230

0.063

0.0024"

0.044

0.0017

250 Mesh

53 Ám

No. 270

0.053

0.0020"

0.037

0.0014

270 Mesh

45 Ám

No. 325

0.045

0.0017"

0.03

0.0012

325 Mesh

38 Ám

No. 400

0.038

0.0015"

0.025

0.001

400 Mesh

32 Ám

No. 450

0.032

0.0012"

0.0011

0.0004

 

25 Ám

No. 500

0.025

0.00098"

0.001

0.000039

 

20 Ám

No. 635

0.02

0.00078"

0.0008

0.000031

 

On a mesh count (per inch), the wire diameter affects the micron hole size

 

Specifications for Nylon, Polyester and Polypropylene Meshes

 

 

Mesh

Mesh

Openings per sq. inch

Thread Dia.

Thread Dia.

Opening

Opening Size

Open Area

Micron

 

 

 

inch

Ám

size inch

Ám

 

Rating

Nylon

50

50 x 50

0.0085

216

0.0118

300

34%

300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nylon

100

104 x 104

0.0037

94

0.0059

150

38%

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nylon

150

145 x 145

0.003

76

0.0039

100

32%

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nylon

200

198 x 198

0.0015

38

0.0035

89

49%

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nylon

300

307 x 307

0.0013

33

0.002

51

37%

37

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Nylon

400

371 x 371

0.0016

41

0.0011

28

17%

28

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polyester

50

45.7 x 45.7

0.0074

188

0.0148

376

46%

375

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polyester

100

109 x 109

0.0034

86

0.0059

150

41%

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polyester

150

145 x 145

0.003

76

0.0039

100

32%

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polyester

300

320 x 320

0.0016

41

0.0016

41

25%

40

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polyester

400

271 x 371

0.0017

43

0.0011

28

16%

27

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polypropylene

20

20 x 20

0.0114

290

0.0374

950

45%

840

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polypropylene

27

27 x 27

0.0114

290

0.0256

650

38.50%

590

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polypropylene

35

35 x 35

0.0114

290

0.0171

435

35.30%

420

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polypropylene

50

56 x 56

0.0085

216

0.0098

249

29%

250

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Polypropylene

100

98 x 98

0.0043

109

0.0059

150

34%

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fluorocarbon

20

23 x 23

0.0108

275

0.0326

829

57%

800

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fluorocarbon

50

51 x 51

0.0085

215

0.0111

283

36%

250

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gauge

 

Gauge to Inches to Millimeters Conversion Table

 

 

 

 

B & S

Inch

Millimeter

Inch

 

B & S

Inch

Millimeter

Inch

Gauge

(Decimal)

(mm)

(Fraction)

 

Gauge

(Decimal)

(mm)

(Fraction)

1

0.289

7.348

.

 

17

0.045

1.149

.

2

0.258

6.543

.

 

18

0.04

1.024

.

.

0.25

6.35

1/4

 

19

0.036

0.912

.

.

0.234

5.953

15/64

 

20

0.032

0.812

.

3

0.229

5.827

.

 

.

0.031

0.795

1/32

.

0.219

5.556

7/32

 

21

0.028

0.723

.

4

0.204

5.189

.

 

22

0.025

0.644

.

.

0.203

5.154

13/64

 

23

0.023

0.573

.

.

0.188

4.762

3/16

 

24

0.02

0.511

.

5

0.182

4.621

.

 

25

0.018

0.455

.

.

0.172

4.366

11/64

 

26

0.016

0.405

.

6

0.162

4.115

.

 

.

0.016

0.396

1/64

.

0.156

3.969

5/32

 

27

0.014

0.36

.

7

0.144

3.664

.

 

28

0.013

0.321

.

.

0.141

3.572

11/64

 

29

0.011

0.286

.

8

0.128

3.263

.

 

30

0.01

0.255

.

.

0.125

3.175

1/8

 

31

0.0089

0.226

.

9

0.114

2.906

.

 

32

0.008

0.2

.

.

0.109

2.778

7/64

 

33

0.0071

0.18

.

10

0.102

2.588

.

 

34

0.0063

0.16

.

.

0.094

2.381

3/32

 

35

0.0056

0.142

.

11

0.091

2.304

.

 

36

0.005

0.13

.

12

0.081

2.052

.

 

37

0.0045

0.114

.

.

0.078

1.984

5/64

 

38

0.004

0.1

.

13

0.072

1.828

.

 

.

.

.

.

14

0.064

1.628

.

 

.

.

.

.

.

0.063

1.588

1/16

 

.

.

.

.

15

0.057

1.449

.

 

.

.

.

.

16

0.051

1.291

.

 

.

.

.

.

.

0.047

1.191

3/64

 

.

.

.

.

Properties of nylon, polyester, polypropylene and polyethylene

nylon-polyester-polypropylene-polyethylene-mesh

Mesh suitability depends on the application temperature and pH. Nylon is more temperature resistant, while polyethylene is more acid resistant.

 

 

 

 

 

 

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