5 in.
4.24 in.
4 in. (b)
3
1
/2 in.
3 in.
2
1
/2 in.
2.12 in.
2 in. (b)
1
3
/4 in.
1
1
/2 in.
1
1
/4 in.
1.06 in.
1 in. (b)
7
/8 in.
3
/4 in.
5
/8 in.
.530 in.
1
/2 in. (b)
7
/16 in.
3
/8 in.
5
/16 in.
.265 in.
1
/4 in. (b)
no. 3
1
/2 (c)
No. 4
No. 5
No. 6
No. 7
No. 8
No.10
No.12
No.14
No.16
No.18
No.20
No.25
No.30
No.35
No.40
No.45
No.50
No.60
No.70
No.80
No.100
No.120
No.140
No.170
No.200
No.230
No.270
No.325
No.400
No.450
No.500
No.635
125
106
100
90
75
63
53
50
45
37.5
31.5
26.5
25.0
22.4
19.0
16.0
13.2
12.5
11.2
9.5
8.0
6.7
6.3
5.6
4.75
4.00
3.35
2.80
2.36
2.00
1.70
1.40
1.18
1.00
0.850
0.710
0.600
0.500
0.425
0.355
0.300
0.250
0.212
0.180
0.150
0.125
0.106
0.090
0.075
0.063
0.053
0.045
0.038
5
4.24
4.00
3.50
3.00
2.50
2.12
2.00
1.75
1.50
1.25
1.06
1.00
0.875
0.750
0.625
0.530
0.500
0.438
0.375
0.312
0.265
0.250
0.223
0.187
0.157
0.132
0.111
0.0937
0.0787
0.0661
0.0555
0.0469
0.0394
0.0331
0.0278
0.0234
0.0197
0.0165
0.0139
0.0117
0.0098
0.0083
0.0070
0.0059
0.0049
0.0041
0.0035
0.0029
0.0025
0.0021
0.0017
0.0015
0.00126
0.00098
0.00079
8
6.40
6.30
6.08
5.80
5.50
5.15
5.05
4.85
4.59
4.23
3.90
3.80
3.50
3.30
3.00
2.75
2.67
2.45
2.27
2.07
1.87
1.82
1.68
1.54
1.37
1.23
1.10
1.00
.900
.810
.725
.650
.580
.510
.450
.390
.340
.290
.247
.215
.180
.152
.131
.110
.091
.076
.064
.053
.044
.037
.030
.025
.0011
.001
.0008
.3150
.2520
.2480
.2394
.2283
.2165
.2028
.1988
.1909
.1807
.1665
.1535
.1496
.1378
.1299
.1181
.1083
.1051
.0965
.0894
.0815
.0736
.0717
.0661
.0606
.0539
.0484
.0430
.0394
.0354
.0319
.0285
.0256
.0228
.0201
.0177
.0154
.0134
.0114
.0097
.0085
.0071
.0060
.0052
.0043
.0036
.0030
.0025
.0021
.0017
.0015
.0012
.0010
. . . . .
. . . . .
. . . . .
. . . . .
. . . . .
.
. . . .
. . . . .
. . . . .
. . . . .
. . . . .
. .. . .
1.050 in.
. . . .
.883 in.
.742 in.
.624 in.
.525 in.
. . . . .
.441 in.
.371 in.
2
1
/2 mesh
3 mesh
. . . . .
3
1
/2 mesh
4 mesh
5 mesh
6 mesh
7 mesh
8 mesh
9 mesh
10 mesh
12 mesh
14 mesh
16 mesh
20 mesh
24 mesh
28 mesh
32 mesh
35 mesh
42 mesh
48 mesh
60 mesh
65 mesh
80 mesh
100 mesh
115 mesh
150 mesh
170 mesh
200 mesh
250 mesh
270 mesh
325 mesh
400 mesh
AlternateStandard mm
inch
(approx.
equivalents)
mm
Screen Scale
Equivalent
Designation
inch
(approx.
equivalents)
Sieve Designation Sieve Opening Nominal Wire Diameter
U.S. SIEVE SERIES AND SCREEN SCALE EQUIVALENTS A.S.T.M. -- E-11-87
(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.
125 mm
106 mm
100 mm
90 mm
75 mm
63 mm
53 mm
50 mm
45 mm
37.5 mm
31.5 mm
26.5 mm
25.0 mm
22.4 mm
19.0 mm
16.0 mm
13.2 mm
12.5 mm
11.2 mm
9.5 mm
8.0 mm
6.7 mm
6.3 mm
5.6 mm
4.75 mm
4.00 mm
3.35 mm
2.80 mm
2.36 mm
2.00 mm
1.70 mm
1.40 mm
1.18 mm
1.00 mm
850 mm
710 mm
600 mm
500 mm
425 mm
355 mm
300 mm
250 mm
212 mm
180 mm
150 mm
125 mm
106 mm
90 mm
75 mm
63 mm
53 mm
45 mm
38 mm
32 mm
25 mm
20 mm
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