Compass Wire

Sieve Designation Sieve Opening Nominal Wire Diameter Screen Scale Equivalent Designation

Standard Alternate mm inch (approx. equivalents) mm inch (approx. equivalents)

125 mm 5 in. 125 5.00 8.00 0.3150 -

106 mm 4.24. in. 106 4.24 6.40 0.2520 -

100 mm 4 in. (b) 100 4.00 6.30 0.2480 -

90 mm 3 1/2 in. 90 3.50 6.08 0.2394 -

75 mm 3 in. 75 3.00 5.80 0.2283 -

63 mm 2 1/2 in. 63 2.50 5.50 0.2165 -

53 mm 2.12 in. 53 2.12 5.15 0.2028 -

50 mm 2 in. (b) 50 2.00 5.05 0.1988 -

45 mm 1 3/4 in. 45 1.75 4.85 0.1909 -

37.5 mm 1 1/2 in. 37.5 1.50 4.59 0.1807 -

31.5 mm 1 1/4 in. 31.5 1.25 4.23 0.1665 -

26.5 mm 1.06 in. 26.5 1.06 3.90 0.1535 1.050 in.

25.0 mm 1 in. (b) 25.0 1.00 3.80 0.1496 -

22.4 mm 7/8 in. 22.4 0.875 3.50 0.1378 .883 in.

19.0 mm 3/4 in. 19.0 0.750 3.30 0.1299 .742 in.

16.0 mm 5/8 in. 16.0 0.625 3.00 0.1181 .624 in.

13.2 mm .530 in. 13.2 0.530 2.75 0.1083 .525 in.

12.5 mm 1/2 in. (b) 12.5 0.500 2.67 0.1051 -

11.2 mm 7/16 in. 11.2 0.438 2.45 0.0965 .441 in.

9.5 mm 3/8 in. 9.5 0.375 2.27 0.0894 .371 in.

8.0 mm 5/16 in. 8.0 0.312 2.07 0.0815 2 1/2 mesh

6.7 mm .265 in. 6.7 0.265 1.87 0.0736 3 mesh

6.3 mm 1/4 in. (b) 6.3 0.250 1.82 0.0717 -

5.6 mm no. 3 1/2 (c) 5.6 0.223 1.68 0.0661 3 1/2 mesh

4.75 mm No. 4 4.75 0.187 1.54 0.0606 4 mesh

4.00 mm No. 5 4.00 0.157 1.37 0.0539 5 mesh

3.35 mm No. 6 3.35 0.132 1.23 0.0484 6 mesh

2.80 mm No. 7 2.80 0.111 1.10 0.0430 7 mesh

2.36 mm No. 8 2.36 0.0937 1.00 0.0394 8 mesh

2.00 mm No.10 2.00 0.0787 0.900 0.0354 9 mesh

1.70 mm No.12 1.70 0.0661 0.810 0.0319 10 mesh

1.40 mm No.14 1.40 0.0555 0.725 0.0285 12 mesh

1.18 mm No.16 1.18 0.0469 0.650 0.0256 14 mesh

1.00 mm No.18 1.00 0.0394 0.580 0.0228 16 mesh

850 mm No.20 0.850 0.0331 0.510 0.0201 20 mesh

710 mm No.25 0.710 0.0278 0.450 0.0177 24 mesh

600 mm No.30 0.600 0.0234 0.390 0.0154 28 mesh

500 mm No.35 0.500 0.0197 0.340 0.0134 32 mesh

425 mm No.40 0.425 0.0165 0.290 0.0114 35 mesh

355 mm No.45 0.355 0.0139 0.247 0.0097 42 mesh

300 mm No.50 0.300 0.0117 0.215 0.0085 48 mesh

250 mm No.60 0.250 0.0098 0.180 0.0071 60 mesh

212 mm No.70 0.212 0.0083 0.152 0.0060 65 mesh

180 mm No.80 0.180 0.0070 0.131 0.0052 80 mesh

150 mm No.100 0.150 0.0059 0.110 0.0043 100 mesh

125 mm No.120 0.125 0.0049 0.091 0.0036 115 mesh

106 mm No.140 0.106 0.0041 0.076 0.0030 150 mesh

90 mm No.170 0.090 0.0035 0.064 0.0025 170 mesh

75 mm No.200 0.075 0.0029 0.053 0.0021 200 mesh

63 mm No.230 0.063 0.0025 0.044 0.0017 250 mesh

53 mm No.270 0.053 0.0021 0.037 0.0015 270 mesh

45 mm No.325 0.045 0.0017 0.030 0.0012 325 mesh

38 mm No.400 0.038 0.0015 0.025 0.0010 400 mesh

32 mm No.450 - 0.00126 0.0011 - -

25 mm No.500 - 0.00098 0.0010 - -

20 mm No.635 - 0.00079 0.0008 - -

(a) These standard designations correspond to the values for test sieves apertures recommended by the International Standards Organization, Geneva, Switzerland.
(b) These sieves are not in the fourth root of 2 Series, but they have been included because they are in common usage.
(c) These numbers (3 1/2 to 400) are the approximate number of openings per linear inch but it is preferred that the sieve be identified by the standard designation in millimeters or mm.
1000 mm = 1 mm.