International
(ISO 566)

American
(ASTM)

Tyler
(STD SCRN)

British
(BS 410)

German
(DIN 4188)

Nominal Opening

Alt. US Std.

Equivalent

Aperture

(mm/mm)

(DIN)

(mm/mm)

(inch/sieve)

(inch/mesh)

(BS mesh)

4.00 mm

2E

26.50 mm

2.00

3E

25.00

1.00

1.50

4

22.40

7/8

0.883

1.20

5

19.00

3/4

0.742

1.00

6

16.00

5/8

0.624

750 mm

8

13.20

0.530

0.525

600

10

12.50

1/2

500

12

11.20

7/16

0.441

430

14

9.50

3/8

0.371

400

16

8.00

5/16

340

18E

6.70

0.265

3

300

20

250

24

5.60

3.5

3

200

30

4.75

4

4

3.5

170

35E

4.00

5

5

4

150

40

3.35

6

6

5

120

50

2.80

7

7

6

100

60

2.36

8

8

7

90

70

75

80

2.00

10

9

8

67

90E

1.70

12

10

10

60

100

1.40

14

12

12

56

110

1.18

16

14

14

50

120

1.00

18

16

16

36

130

25

200

850 mm

20

20

18

710

25

24

22

600

30

28

25

500

35

32

30

38

425

40

35

36

4.00

37

355

45

42

44

3.15

36

2.50

35

300

50

48

52

2.00

34

250

60

60

60

1.60

33

212

70

65

72

1.25

32

180

80

80

85

1.00

31

30

150

100

100

100

630

29

125

120

115

120

500

28

106

140

150

150

400

27

90

170

170

170

315

26

75

200

200

200

250

25

63

230

250

240

200

24

53

270

270

300

160

23

45

325

325

350

125

22

100

21

38

400

400

400

80

20

32

450

440

63

19

25

500

50

18

20

635

40

17