Standard Testing Sieves ASTM Specification E-11
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Nominal Dimensions, Permissible Variations for Wire Cloth of Standard Test Sieves Standard Series
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Sieve Designation
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Norminal Sieve Opening
inch (c)
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Permissible Variation of Average Opening from the Standard Sieve Designation
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Opening Dimension Exceeded by not more than 5% of the openings
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Maximum Individual Opening
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Nominal Diameter
mm (a)
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Standard(b)
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Alternative
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125mm
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5"
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5
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±3.70mm
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130.0mm
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130.9mm
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8
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106mm
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4.24"
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4.24
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±3.20mm
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110.2mm
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111.1mm
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6.3
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100mm (d)
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4"
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4
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±3.00mm
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104.0mm
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104.8mm
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6.3
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90mm
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3.5"
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3.5
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±2.70mm
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93.6mm
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94.4mm
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6.3
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75mm
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3"
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3
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±2.20mm
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78.1mm
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78.7mm
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6.3
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63mm
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2.5"
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2.5
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±1.90mm
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65.6mm
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66.2mm
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5.6
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53mm
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2.5"
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2.12
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±1.60mm
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55.2mm
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55.7mm
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5
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50mm (d)
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2"
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2
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±1.50mm
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52.1mm
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52.6mm
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5
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45mm
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1.75"
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1.75
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±1.40mm
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46.9mm
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47.4mm
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4.5
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37.5mm
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1.5"
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1.5
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±1.10mm
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39.1mm
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39.5mm
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4.5
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31.5mm
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1.25"
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1.25
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±1.00mm
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32.9mm
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33.2mm
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4
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26.5mm
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1.06"
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1.06
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±0.800mm
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27.7mm
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28.0mm
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3.55
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25.0mm
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1.00"
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1
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±0.800mm
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26.1mm
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26.4mm
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3.55
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22.4mm
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0.875"
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0.875
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±0.700mm
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23.4mm
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23.7mm
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3.55
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19.0mm
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0.75"
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0.75
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±0.600mm
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19.9mm
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20.1mm
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3.15
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16.0mm
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0.625"
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0.625
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±0.500mm
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16.7mm
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17.0mm
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3.15
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13.2mm
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0.530"
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0.53
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±0.410mm
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13.83mm
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14.05mm
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2.8
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12.5mm (d)
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0.5"
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0.5
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±0.390mm
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13.10mm
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13.31mm
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2.5
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11.2mm
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7.0625"
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0.438
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±0.350mm
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11.75mm
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11.94mm
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2.5
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9.5mm
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0.375"
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0.375
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±0.300mm
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9.97mm
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10.16mm
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2.24
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8.0mm
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0.3125"
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0.312
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±0.250mm
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8.41mm
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8.58mm
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2
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6.7mm
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0.265"
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0.265
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±0.210mm
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7.05mm
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7.20mm
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1.8
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6.3mm (d)
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0.25"
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0.25
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±0.200mm
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6.64mm
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6.78mm
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1.8
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5.6mm
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No. 3.5 (e)
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0.223
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±0.180mm
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5.90mm
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6.04mm
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1.6
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4.75mm
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No. 4
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0.187
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±0.150mm
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5.02mm
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5.146mm
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1.6
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4.0mm
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No. 5
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0.157
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±0.130mm
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4.23mm
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4.35mm
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1.4
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3.35mm
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No. 6
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0.132
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±0.110mm
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3.55mm
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3.66mm
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1.25
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2.8mm
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No. 7
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0.11
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±0.095mm
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2.975mm
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3.070mm
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1.12
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2.36mm
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No. 8
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0.0937
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±0.080mm
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2.515mm
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2.600mm
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1
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2.0mm
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No. 10
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0.0787
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±0.070mm
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2.135mm
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2.215mm
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0.9
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1.7mm
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No. 12
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0.0661
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±0.060mm
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1.820mm
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1.890mm
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0.8
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1.4mm
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No. 14
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0.0555
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±0.050mm
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1.505mm
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1.565mm
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0.71
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1.18mm
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No. 16
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0.0469
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±0.045mm
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1.270mm
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1.330mm
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0.63
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1.0mm
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No. 18
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0.0394
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±0040mm
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1.083mm
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1.135mm
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0.56
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850µm (d)
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No. 20
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0.0331
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±35µm
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925µm
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970µm
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0.5
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710µm
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No. 25
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0.0278
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±30µm
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775µm
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815µm
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0.45
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600µm
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No. 30
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0.0234
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±25µm
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660µm
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695µm
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0.4
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500µm
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No. 35
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0.0197
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±20µm
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550µm
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585µm
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0.315
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425µm
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No. 40
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0.0165
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±19µm
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471µm
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502µm
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0.28
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355µm
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No. 45
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0.0139
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±16µm
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396µm
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425µm
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0.224
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300µm
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No. 50
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0.0117
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±14µm
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337µm
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363µm
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0.2
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250µm
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No. 60
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0.0098
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±12µm
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283µm
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306µm
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0.16
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212µm
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No. 70
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0.0083
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±10µm
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242µm
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263µm
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0.14
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180µm
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No. 80
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0.007
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±9µm
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207µm
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227µm
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0.125
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150µm
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No. 100
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0.0059
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±8µm
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174µm
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192µm
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0.1
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125µm
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No. 120
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0.0049
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±7µm
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147µm
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163µm
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0.09
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106µm
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No. 140
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0.0041
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±6µm
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126µm
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141µm
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0.071
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90µm
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No. 170
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0.0035
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±5µm
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108µm
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122µm
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0.063
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75µm
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No. 200
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0.0029
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±5µm
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91µm
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103µm
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0.05
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63µm
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No. 230
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0.0025
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±4µm
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77µm
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89µm
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0.045
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53µm
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No. 270
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0.0021
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±4µm
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66µm
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76µm
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0.036
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45µm
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No. 325
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0.0017
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±3µm
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57µm
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66µm
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0.032
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38µm
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No. 400
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0.0015
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±3µm
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48µm
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57µm
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0.030
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32µm
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No. 450
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0.0012
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±3µm
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42µm
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50µm
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0.028
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25µm (d)
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No. 500
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0.001
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±3µm
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34µm
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41µm
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0.025
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20µm (d)
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No. 635
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0.0008
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±3µm
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29µm
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35µm
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0.02
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(a) The average diameter of the wires in the x and the y direction, measured separately, of any wire cloth shall not deviate from the nominal values by more than ±15%.
(b) These standard designations correspond to the values for the test sieve openings recommended by The International Organisation for Standardisation (ISO) Geneva, Switzerland, except where noted.
(c) Only approximately to the metric values in Column 1.
(d) These sieves are not in the standard series but they have been included because they are in common usage.
(e) these numbers (3.5 to 635) 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 micrometers.
(f) 1,000µm = 1mm
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