Which measurement of the openings/aperture do you want to covert to the ASTM E11 Sieve Designation?
Millimeters (mm)
Micrometers (μm)
Inches (in.)
Millimeter
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 mm
22.4 mm
19 mm
16 mm
13.2 mm
12.5 mm
11.2 mm
9.5 mm
8 mm
6.7 mm
6.3 mm
5.6 mm
4.75 mm
4 mm
3.35 mm
2.8 mm
2.36 mm
2 mm
1.7 mm
1.4 mm
1.18 mm
1 mm
Select nominal sieve opening measurement from dropdown menu
Micrometers
850 um
710 um
600 um
500 um
425 um
355 um
300 um
250 um
212 um
180 um
150 um
125 um
106 um
90 um
75 um
63 um
53 um
45 um
38 um
32 um
25 um
20 um
Select nominal sieve opening measurement from dropdown menu
Inches
5 in.
4.24 in.
4 in.
3.5 in.
3 in.
2.5 in.
2.12 in.
2 in.
1.75 in.
1.5 in.
1.25 in.
1.06 in.
1 in.
0.875 in.
0.750 in.
0.625 in.
0.530 in.
0.500 in.
0.438 in.
0.375 in.
0.312 in.
0.265 in.
0.250 in.
0.223 in.
0.187 in.
0.157 in.
0.132 in.
0.110 in.
0.0937 in.
0.0787 in.
0.0661 in.
0.0555 in.
0.0469 in.
0.0394 in.
0.0331 in.
0.0278 in.
0.0234 in.
0.0197 in.
0.0165 in.
0.0139 in.
0.0117 in.
0.0098 in.
0.0083 in.
0.0070 in.
0.0059 in.
0.0049 in.
0.0041 in.
0.0035 in.
0.0029 in.
0.0025 in.
0.0021 in.
0.0017 in.
0.0015 in.
0.0012 in.
0.0010 in.
0.0008 in.
Select nominal sieve opening measurement from dropdown menu
ASTM 5"
ASTM E11-17 Sieve Designation: 5" | Nominal Sieve Opening - Metric: 125 mm Inches: 5 in. | ± Y Variation for Average Opening: 3.3 mm | + X Maximum Variation for Opening: 4.06 mm | Resulting Maximum Individual Opening: 129.06 mm | Typical Wire Diameter: 8 mm | Permissible Range of Choice - Min: 6.8 Max: 9.2
ASTM 4.24"
ASTM E11-17 Sieve Designation: 4.24" | Nominal Sieve Opening - Metric: 106 mm Inches: 4.24 in. | ± Y Variation for Average Opening: 2.8 mm | + X Maximum Variation for Opening: 3.59 mm | Resulting Maximum Individual Opening: 109.59 mm | Typical Wire Diameter: 6.3 mm | Permissible Range of Choice - Min: 5.4 Max: 7.2
ASTM 4"
ASTM E11-17 Sieve Designation: 4" | Nominal Sieve Opening - Metric: 100 mm Inches: 4 in. | ± Y Variation for Average Opening: 2.65 mm | + X Maximum Variation for Opening: 3.44 mm | Resulting Maximum Individual Opening: 103.44 mm | Typical Wire Diameter: 6.3 mm | Permissible Range of Choice - Min: 5.4 Max: 7.2
ASTM 3 1/2"
ASTM E11-17 Sieve Designation: 3-1/2" | Nominal Sieve Opening - Metric: 90 mm Inches: 3.5 in. | ± Y Variation for Average Opening: 2.39 mm | + X Maximum Variation for Opening: 3.18 mm | Resulting Maximum Individual Opening: 93.18 mm | Typical Wire Diameter: 6.3 mm | Permissible Range of Choice - Min: 5.4 Max: 7.2
ASTM 3"
ASTM E11-17 Sieve Designation: 3" | Nominal Sieve Opening - Metric: 75 mm Inches: 3 in. | ± Y Variation for Average Opening: 2 mm | + X Maximum Variation for Opening: 2.78 mm | Resulting Maximum Individual Opening: 77.78 mm | Typical Wire Diameter: 6.3 mm | Permissible Range of Choice - Min: 5.4 Max: 7.2
ASTM 2 1/2"
ASTM E11-17 Sieve Designation: 2-1/2" | Nominal Sieve Opening - Metric: 63 mm Inches: 2.5 in. | ± Y Variation for Average Opening: 1.69 mm | + X Maximum Variation for Opening: 2.44 mm | Resulting Maximum Individual Opening: 65.44 mm | Typical Wire Diameter: 5.6 mm | Permissible Range of Choice - Min: 4.8 Max: 6.4
ASTM 2.12"
ASTM E11-17 Sieve Designation: 2.12" | Nominal Sieve Opening - Metric: 53 mm Inches: 2.12 in. | ± Y Variation for Average Opening: 1.42 mm | + X Maximum Variation for Opening: 2.15 mm | Resulting Maximum Individual Opening: 55.15 mm | Typical Wire Diameter: 5 mm | Permissible Range of Choice - Min: 4.3 Max: 5.8
ASTM 2"
ASTM E11-17 Sieve Designation: 2" | Nominal Sieve Opening - Metric: 50 mm Inches: 2 in. | ± Y Variation for Average Opening: 1.34 mm | + X Maximum Variation for Opening: 2.06 mm | Resulting Maximum Individual Opening: 52.06 mm | Typical Wire Diameter: 5 mm | Permissible Range of Choice - Min: 4.3 Max: 5.8
ASTM 1 3/4"
ASTM E11-17 Sieve Designation: 1-3/4" | Nominal Sieve Opening - Metric: 45 mm Inches: 1.75 in. | ± Y Variation for Average Opening: 1.21 mm | + X Maximum Variation for Opening: 1.91 mm | Resulting Maximum Individual Opening: 46.91 mm | Typical Wire Diameter: 4.5 mm | Permissible Range of Choice - Min: 3.8 Max: 5.2
ASTM 1 1/2"
ASTM E11-17 Sieve Designation: 1-1/2" | Nominal Sieve Opening - Metric: 37.5 mm Inches: 1.5 in. | ± Y Variation for Average Opening: 1.01 mm | + X Maximum Variation for Opening: 1.67 mm | Resulting Maximum Individual Opening: 39.17 mm | Typical Wire Diameter: 4.5 mm | Permissible Range of Choice - Min: 3.8 Max: 5.2
ASTM 1 1/4"
ASTM E11-17 Sieve Designation: 1-1/4" | Nominal Sieve Opening - Metric: 31.5 mm Inches: 1.25 in. | ± Y Variation for Average Opening: 0.855 mm | + X Maximum Variation for Opening: 1.47 mm | Resulting Maximum Individual Opening: 32.97 mm | Typical Wire Diameter: 4 mm | Permissible Range of Choice - Min: 3.4 Max: 4.6
ASTM 1.06"
ASTM E11-17 Sieve Designation: 1.06" | Nominal Sieve Opening - Metric: 26.5 mm Inches: 1.06 in. | ± Y Variation for Average Opening: 0.722 mm | + X Maximum Variation for Opening: 1.29 mm | Resulting Maximum Individual Opening: 27.79 mm | Typical Wire Diameter: 3.55 mm | Permissible Range of Choice - Min: 3 Max: 4.1
ASTM 1.00"
ASTM E11-17 Sieve Designation: 1.00" | Nominal Sieve Opening - Metric: 25 mm Inches: 1 in. | ± Y Variation for Average Opening: 0.682 mm | + X Maximum Variation for Opening: 1.24 mm | Resulting Maximum Individual Opening: 26.24 mm | Typical Wire Diameter: 3.55 mm | Permissible Range of Choice - Min: 3 Max: 4.1
ASTM 7/8"
ASTM E11-17 Sieve Designation: 7/8" | Nominal Sieve Opening - Metric: 22.4 mm Inches: 0.875 in. | ± Y Variation for Average Opening: 0.613 mm | + X Maximum Variation for Opening: 1.14 mm | Resulting Maximum Individual Opening: 23.54 mm | Typical Wire Diameter: 3.55 mm | Permissible Range of Choice - Min: 3 Max: 4.1
ASTM 3/4"
ASTM E11-17 Sieve Designation: 3/4" | Nominal Sieve Opening - Metric: 19 mm Inches: 0.75 in. | ± Y Variation for Average Opening: 0.522 mm | + X Maximum Variation for Opening: 1.01 mm | Resulting Maximum Individual Opening: 20.01 mm | Typical Wire Diameter: 3.15 mm | Permissible Range of Choice - Min: 2.7 Max: 3.6
ASTM 5/8"
ASTM E11-17 Sieve Designation: 5/8" | Nominal Sieve Opening - Metric: 16 mm Inches: 0.625 in. | ± Y Variation for Average Opening: 0.441 mm | + X Maximum Variation for Opening: 0.89 mm | Resulting Maximum Individual Opening: 16.89 mm | Typical Wire Diameter: 3.15 mm | Permissible Range of Choice - Min: 2.7 Max: 3.6
ASTM 0.530"
ASTM E11-17 Sieve Designation: 0.530" | Nominal Sieve Opening - Metric: 13.2 mm Inches: 0.53 in. | ± Y Variation for Average Opening: 0.365 mm | + X Maximum Variation for Opening: 0.78 mm | Resulting Maximum Individual Opening: 13.98 mm | Typical Wire Diameter: 2.8 mm | Permissible Range of Choice - Min: 2.4 Max: 3.2
ASTM 1/2"
ASTM E11-17 Sieve Designation: 1/2" | Nominal Sieve Opening - Metric: 12.5 mm Inches: 0.5 in. | ± Y Variation for Average Opening: 0.346 mm | + X Maximum Variation for Opening: 0.75 mm | Resulting Maximum Individual Opening: 13.25 mm | Typical Wire Diameter: 2.5 mm | Permissible Range of Choice - Min: 2.1 Max: 2.9
ASTM 7/16"
ASTM E11-17 Sieve Designation: 7/16" | Nominal Sieve Opening - Metric: 11.2 mm Inches: 0.438 in. | ± Y Variation for Average Opening: 0.311 mm | + X Maximum Variation for Opening: 0.69 mm | Resulting Maximum Individual Opening: 11.89 mm | Typical Wire Diameter: 2.5 mm | Permissible Range of Choice - Min: 2.1 Max: 2.9
ASTM 3/8"
ASTM E11-17 Sieve Designation: 3/8" | Nominal Sieve Opening - Metric: 9.5 mm Inches: 0.375 in. | ± Y Variation for Average Opening: 0.265 mm | + X Maximum Variation for Opening: 0.61 mm | Resulting Maximum Individual Opening: 10.11 mm | Typical Wire Diameter: 2.24 mm | Permissible Range of Choice - Min: 1.9 Max: 2.6
ASTM 5/16"
ASTM E11-17 Sieve Designation: 5/16" | Nominal Sieve Opening - Metric: 8 mm Inches: 0.312 in. | ± Y Variation for Average Opening: 0.224 mm | + X Maximum Variation for Opening: 0.54 mm | Resulting Maximum Individual Opening: 8.54 mm | Typical Wire Diameter: 2 mm | Permissible Range of Choice - Min: 1.7 Max: 2.3
ASTM 0.265"
ASTM E11-17 Sieve Designation: 0.265" | Nominal Sieve Opening - Metric: 6.7 mm Inches: 0.265 in. | ± Y Variation for Average Opening: 0.189 mm | + X Maximum Variation for Opening: 0.48 mm | Resulting Maximum Individual Opening: 7.18 mm | Typical Wire Diameter: 1.8 mm | Permissible Range of Choice - Min: 1.5 Max: 2.1
ASTM 1/4"
ASTM E11-17 Sieve Designation: 1⁄4" | Nominal Sieve Opening - Metric: 6.3 mm Inches: 0.25 in. | ± Y Variation for Average Opening: 0.178 mm | + X Maximum Variation for Opening: 0.46 mm | Resulting Maximum Individual Opening: 6.76 mm | Typical Wire Diameter: 1.8 mm | Permissible Range of Choice - Min: 1.5 Max: 2.1
ASTM #3.5
ASTM E11-17 Sieve Designation: #3.5 | Nominal Sieve Opening - Metric: 5.6 mm Inches: 0.223 in. | ± Y Variation for Average Opening: 0.159 mm | + X Maximum Variation for Opening: 0.42 mm | Resulting Maximum Individual Opening: 6.02 mm | Typical Wire Diameter: 1.6 mm | Permissible Range of Choice - Min: 1.3 Max: 1.9
ASTM #4
ASTM E11-17 Sieve Designation: #4 | Nominal Sieve Opening - Metric: 4.75 mm Inches: 0.187 in. | ± Y Variation for Average Opening: 0.135 mm | + X Maximum Variation for Opening: 0.37 mm | Resulting Maximum Individual Opening: 5.12 mm | Typical Wire Diameter: 1.6 mm | Permissible Range of Choice - Min: 1.3 Max: 1.9
ASTM #5
ASTM E11-17 Sieve Designation: #5 | Nominal Sieve Opening - Metric: 4 mm Inches: 0.157 in. | ± Y Variation for Average Opening: 0.114 mm | + X Maximum Variation for Opening: 0.33 mm | Resulting Maximum Individual Opening: 4.33 mm | Typical Wire Diameter: 1.4 mm | Permissible Range of Choice - Min: 1.2 Max: 1.7
ASTM #6
ASTM E11-17 Sieve Designation: #6 | Nominal Sieve Opening - Metric: 3.35 mm Inches: 0.132 in. | ± Y Variation for Average Opening: 0.096 mm | + X Maximum Variation for Opening: 0.29 mm | Resulting Maximum Individual Opening: 3.64 mm | Typical Wire Diameter: 1.25 mm | Permissible Range of Choice - Min: 1.06 Max: 1.50
ASTM #7
ASTM E11-17 Sieve Designation: #7 | Nominal Sieve Opening - Metric: 2.8 mm Inches: 0.11 in. | ± Y Variation for Average Opening: 0.081 mm | + X Maximum Variation for Opening: 0.26 mm | Resulting Maximum Individual Opening: 3.06 mm | Typical Wire Diameter: 1.12 mm | Permissible Range of Choice - Min: 0.95 Max: 1.3
ASTM #8
ASTM E11-17 Sieve Designation: #8 | Nominal Sieve Opening - Metric: 2.36 mm Inches: 0.0937 in. | ± Y Variation for Average Opening: 0.069 mm | + X Maximum Variation for Opening: 0.23 mm | Resulting Maximum Individual Opening: 2.59 mm | Typical Wire Diameter: 1 mm | Permissible Range of Choice - Min: 0.85 Max: 1.15
ASTM #10
ASTM E11-17 Sieve Designation: #10 | Nominal Sieve Opening - Metric: 2 mm Inches: 0.0787 in. | ± Y Variation for Average Opening: 0.059 mm | + X Maximum Variation for Opening: 0.2 mm | Resulting Maximum Individual Opening: 2.2 mm | Typical Wire Diameter: 0.9 mm | Permissible Range of Choice - Min: 0.77 Max: 1.04
ASTM #12
ASTM E11-17 Sieve Designation: #12 | Nominal Sieve Opening - Metric: 1.7 mm Inches: 0.0661 in. | ± Y Variation for Average Opening: 0.05 mm | + X Maximum Variation for Opening: 0.18 mm | Resulting Maximum Individual Opening: 1.88 mm | Typical Wire Diameter: 0.8 mm | Permissible Range of Choice - Min: 0.68 Max: 0.92
ASTM #14
ASTM E11-17 Sieve Designation: #14 | Nominal Sieve Opening - Metric: 1.4 mm Inches: 0.0555 in. | ± Y Variation for Average Opening: 0.042 mm | + X Maximum Variation for Opening: 0.16 mm | Resulting Maximum Individual Opening: 1.56 mm | Typical Wire Diameter: 0.71 mm | Permissible Range of Choice - Min: 0.6 Max: 0.82
ASTM #16
ASTM E11-17 Sieve Designation: #16 | Nominal Sieve Opening - Metric: 1.18 mm Inches: 0.0469 in. | ± Y Variation for Average Opening: 0.036 mm | + X Maximum Variation for Opening: 0.14 mm | Resulting Maximum Individual Opening: 1.32 mm | Typical Wire Diameter: 0.63 mm | Permissible Range of Choice - Min: 0.54 Max: 0.72
ASTM #18
ASTM E11-17 Sieve Designation: #18 | Nominal Sieve Opening - Metric: 1 mm Inches: 0.0394 in. | ± Y Variation for Average Opening: 0.03 mm | + X Maximum Variation for Opening: 0.13 mm | Resulting Maximum Individual Opening: 1.13 mm | Typical Wire Diameter: 0.56 mm | Permissible Range of Choice - Min: 0.48 Max: 0.64
ASTM #20
ASTM E11-17 Sieve Designation: #20 | Nominal Sieve Opening - Metric: 850 um Inches: 0.0331 in. | ± Y Variation for Average Opening: 26.2 um | + X Maximum Variation for Opening: 114 um | Resulting Maximum Individual Opening: 964 um | Typical Wire Diameter: 0.5 mm | Permissible Range of Choice - Min: 0.43 Max: 0.58
ASTM #25
ASTM E11-17 Sieve Designation: #25 | Nominal Sieve Opening - Metric: 710 um Inches: 0.0278 in. | ± Y Variation for Average Opening: 22.2 um | + X Maximum Variation for Opening: 101 um | Resulting Maximum Individual Opening: 811 um | Typical Wire Diameter: 0.45 mm | Permissible Range of Choice - Min: 0.38 Max: 0.52
ASTM #30
ASTM E11-17 Sieve Designation: #30 | Nominal Sieve Opening - Metric: 600 um Inches: 0.0234 in. | ± Y Variation for Average Opening: 19 um | + X Maximum Variation for Opening: 91 um | Resulting Maximum Individual Opening: 691 um | Typical Wire Diameter: 0.4 mm | Permissible Range of Choice - Min: 0.34 Max: 0.46
ASTM #35
ASTM E11-17 Sieve Designation: #35 | Nominal Sieve Opening - Metric: 500 um Inches: 0.0197 in. | ± Y Variation for Average Opening: 16.2 um | + X Maximum Variation for Opening: 80 um | Resulting Maximum Individual Opening: 580 um | Typical Wire Diameter: 0.315 mm | Permissible Range of Choice - Min: 0.27 Max: 0.36
ASTM #40
ASTM E11-17 Sieve Designation: #40 | Nominal Sieve Opening - Metric: 425 um Inches: 0.0165 in. | ± Y Variation for Average Opening: 14 um | + X Maximum Variation for Opening: 73 um | Resulting Maximum Individual Opening: 498 um | Typical Wire Diameter: 0.28 mm | Permissible Range of Choice - Min: 0.24 Max: 0.32
ASTM #45
ASTM E11-17 Sieve Designation: #45 | Nominal Sieve Opening - Metric: 355 um Inches: 0.0139 in. | ± Y Variation for Average Opening: 12 um | + X Maximum Variation for Opening: 65 um | Resulting Maximum Individual Opening: 420 um | Typical Wire Diameter: 0.224 mm | Permissible Range of Choice - Min: 0.19 Max: 0.26
ASTM #50
ASTM E11-17 Sieve Designation: #50 | Nominal Sieve Opening - Metric: 300 um Inches: 0.0117 in. | ± Y Variation for Average Opening: 10.4 um | + X Maximum Variation for Opening: 58 um | Resulting Maximum Individual Opening: 358 um | Typical Wire Diameter: 0.2 mm | Permissible Range of Choice - Min: 0.17 Max: 0.23
ASTM #60
ASTM E11-17 Sieve Designation: #60 | Nominal Sieve Opening - Metric: 250 um Inches: 0.0098 in. | ± Y Variation for Average Opening: 8.9 um | + X Maximum Variation for Opening: 52 um | Resulting Maximum Individual Opening: 302 um | Typical Wire Diameter: 0.16 mm | Permissible Range of Choice - Min: 0.13 Max: 0.19
ASTM #70
ASTM E11-17 Sieve Designation: #70 | Nominal Sieve Opening - Metric: 212 um Inches: 0.0083 in. | ± Y Variation for Average Opening: 7.8 um | + X Maximum Variation for Opening: 47 um | Resulting Maximum Individual Opening: 259 um | Typical Wire Diameter: 0.14 mm | Permissible Range of Choice - Min: 0.12 Max: 0.17
ASTM #80
ASTM E11-17 Sieve Designation: #80 | Nominal Sieve Opening - Metric: 180 um Inches: 0.007 in. | ± Y Variation for Average Opening: 6.8 um | + X Maximum Variation for Opening: 43 um | Resulting Maximum Individual Opening: 223 um | Typical Wire Diameter: 0.125 mm | Permissible Range of Choice - Min: 0.106 Max: 0.150
ASTM #100
ASTM E11-17 Sieve Designation: #100 | Nominal Sieve Opening - Metric: 150 um Inches: 0.0059 in. | ± Y Variation for Average Opening: 6 um | + X Maximum Variation for Opening: 38 um | Resulting Maximum Individual Opening: 188 um | Typical Wire Diameter: 0.1 mm | Permissible Range of Choice - Min: 0.085 Max: 0.115
ASTM #120
ASTM E11-17 Sieve Designation: #120 | Nominal Sieve Opening - Metric: 125 um Inches: 0.0049 in. | ± Y Variation for Average Opening: 5.2 um | + X Maximum Variation for Opening: 34 um | Resulting Maximum Individual Opening: 159 um | Typical Wire Diameter: 0.09 mm | Permissible Range of Choice - Min: 0.077 Max: 0.104
ASTM #140
ASTM E11-17 Sieve Designation: #140 | Nominal Sieve Opening - Metric: 106 um Inches: 0.0041 in. | ± Y Variation for Average Opening: 4.7 um | + X Maximum Variation for Opening: 31 um | Resulting Maximum Individual Opening: 137 um | Typical Wire Diameter: 0.071 mm | Permissible Range of Choice - Min: 0.06 Max: 0.082
ASTM #170
ASTM E11-17 Sieve Designation: #170 | Nominal Sieve Opening - Metric: 90 um Inches: 0.0035 in. | ± Y Variation for Average Opening: 4.2 um | + X Maximum Variation for Opening: 29 um | Resulting Maximum Individual Opening: 119 um | Typical Wire Diameter: 0.063 mm | Permissible Range of Choice - Min: 0.054 Max: 0.072
ASTM #200
ASTM E11-17 Sieve Designation: #200 | Nominal Sieve Opening - Metric: 75 um Inches: 0.0029 in. | ± Y Variation for Average Opening: 3.7 um | + X Maximum Variation for Opening: 26 um | Resulting Maximum Individual Opening: 101 um | Typical Wire Diameter: 0.05 mm | Permissible Range of Choice - Min: 0.043 Max: 0.058
ASTM #230
ASTM E11-17 Sieve Designation: #230 | Nominal Sieve Opening - Metric: 63 um Inches: 0.0025 in. | ± Y Variation for Average Opening: 3.4 um | + X Maximum Variation for Opening: 24 um | Resulting Maximum Individual Opening: 87 um | Typical Wire Diameter: 0.045 mm | Permissible Range of Choice - Min: 0.038 Max: 0.052
ASTM #270
ASTM E11-17 Sieve Designation: #270 | Nominal Sieve Opening - Metric: 53 um Inches: 0.0021 in. | ± Y Variation for Average Opening: 3.1 um | + X Maximum Variation for Opening: 21 um | Resulting Maximum Individual Opening: 74 um | Typical Wire Diameter: 0.036 mm | Permissible Range of Choice - Min: 0.031 Max: 0.041
ASTM #325
ASTM E11-17 Sieve Designation: #325 | Nominal Sieve Opening - Metric: 45 um Inches: 0.0017 in. | ± Y Variation for Average Opening: 2.8 um | + X Maximum Variation for Opening: 20 um | Resulting Maximum Individual Opening: 65 um | Typical Wire Diameter: 0.032 mm | Permissible Range of Choice - Min: 0.027 Max: 0.037
ASTM #400
ASTM E11-17 Sieve Designation: #400 | Nominal Sieve Opening - Metric: 38 um Inches: 0.0015 in. | ± Y Variation for Average Opening: 2.6 um | + X Maximum Variation for Opening: 18 um | Resulting Maximum Individual Opening: 56 um | Typical Wire Diameter: 0.03 mm | Permissible Range of Choice - Min: 0.024 Max: 0.035
ASTM #450
ASTM E11-17 Sieve Designation: #450 | Nominal Sieve Opening - Metric: 32 um Inches: 0.0012 in. | ± Y Variation for Average Opening: 2.4 um | + X Maximum Variation for Opening: 17 um | Resulting Maximum Individual Opening: 49 um | Typical Wire Diameter: 0.028 mm | Permissible Range of Choice - Min: 0.023 Max: 0.033
ASTM #500
ASTM E11-17 Sieve Designation: #500 | Nominal Sieve Opening - Metric: 25 um Inches: 0.001 in. | ± Y Variation for Average Opening: 2.2 um | + X Maximum Variation for Opening: 15 um | Resulting Maximum Individual Opening: 40 um | Typical Wire Diameter: 0.025 mm | Permissible Range of Choice - Min: 0.021 Max: 0.029
ASTM #635
ASTM E11-17 Sieve Designation: #635 | Nominal Sieve Opening - Metric: 20 um Inches: 0.0008 in. | ± Y Variation for Average Opening: 2.1 um | + X Maximum Variation for Opening: 13 um | Resulting Maximum Individual Opening: 33 um | Typical Wire Diameter: 0.02 mm | Permissible Range of Choice - Min: 0.017 Max: 0.023
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