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Designation, mm Designation, inch/No Nominal Sieve Opening (in.) +/- Y variation average opening, mm +X Maximum variation for opening, mm Resulting Maximum Individual Opening, mm (designation, + X opening) Compliance Sieves, sample x openings per 100 ft^2 Compliance Sieves, maximum standard deviation Inspection Sieves, sample openings per sieve Inspection Sieves, maximum standard deviation Calibration Sieves, sample openings per sieve Calibration Sieves, Maximum Standard Deviation Typical Wire diameter, mm Wire diameter, min, mm Wire diameter, max, mm
125 5 in. 5 3.66 4.51 129.51 20 – all – all – 8 6.8 9.2
106 4.24 in. 4.24 3.12 3.99 109.99 20 – all – all – 6.3 5.4 7.2
100 4 in. 4 2.94 3.82 103.82 20 – all – all – 6.3 5.4 7.2
90 3 1/2 in. 3.5 2.65 3.53 93.53 20 – all – all – 6.3 5.4 7.2
75 3 in. 3 2.22 3.09 78.09 20 – all – all – 6.3 5.4 7.2
63 2 1/2 in. 2.5 1.87 2.71 65.71 20 – all – all – 5.6 4.8 6.4
53 2.12 in. 2.12 1.58 2.39 55.39 20 – all – all – 5 4.3 5.8
50 2 in. 2 1.49 2.29 52.29 20 – all – all – 5 4.3 5.8
45 1 3/4 in. 1.75 1.35 2.12 47.12 20 – all – all – 4.5 3.8 5.2
37.5 1 1/2 in. 1.5 1.13 1.85 39.35 20 1.374 all – all – 4.5 3.8 5.2
31.5 1 1/4 in. 1.25 0.95 1.63 33.13 20 1.066 all – all – 4 3.4 4.6
26.5 1.06 in. 1.06 0.802 1.44 27.94 20 0.869 15 0.584 all – 3.55 3 4.1
25 1.00 in. 1 0.758 1.38 26.38 20 0.823 15 0.553 all – 3.55 3 4.1
22.4 7/8 in. 0.875 0.681 1.27 23.67 150 0.734 15 0.493 all – 3.55 3 4.1
19 3/4 in. 0.75 0.579 1.13 20.13 150 0.622 15 0.418 30 0.446 3.15 2.7 3.5
16 5/8 in. 0.625 0.49 0.99 16.99 150 0.527 15 0.354 30 0.378 3.15 2.7 3.6
13.2 0.530 in. 0.53 0.406 0.86 14.06 150 0.441 15 0.296 30 0.316 2.8 2.4 3.2
12.5 1/2 in. 0.5 0.385 0.83 13.33 150 0.421 15 0.283 30 0.302 2.5 2.1 2.9
11.2 7/16 in. 0.438 0.346 0.77 11.97 150 0.382 15 0.256 30 0.274 2.5 2.1 2.9
9.5 3/8 in. 0.375 0.295 0.68 10.18 150 0.33 15 0.222 30 0.237 2.24 1.9 2.6
8 5/16 in. 0.312 0.249 0.6 8.6 150 0.284 15 0.191 30 0.204 2 1.7 2.3
6.7 0.265 in. 0.265 0.21 0.53 7.23 150 0.245 15 0.164 30 0.175 1.8 1.5 2.1
6.3 1/4 in. 0.25 0.197 0.51 6.81 150 0.233 15 0.157 30 0.167 1.8 1.5 2.1
5.6 No. 3 1/2 0.223 0.176 0.47 6.07 150 0.211 15 0.142 30 0.151 1.6 1.3 1.9
4.75 No. 4 0.187 0.15 0.41 5.16 150 0.182 15 0.123 30 0.131 1.6 1.3 1.9
4 No. 5 0.157 0.127 0.37 4.37 150 0.161 15 0.108 30 0.115 1.4 1.2 1.7
3.35 No. 6 0.132 0.107 0.32 3.67 200 0.138 20 0.097 40 0.103 1.25 1.06 1.5
2.8 No. 7 0.11 0.09 0.29 3.09 200 0.121 20 0.085 40 0.09 1.12 0.95 1.3
2.36 No. 8 0.0937 0.076 0.25 2.61 200 0.104 20 0.073 40 0.077 1 0.85 1.15
2 No. 10 0.0787 0.065 0.23 2.23 250 0.094 25 0.068 50 0.072 0.9 0.77 1.04
1.7 No. 12 0.0661 0.056 0.2 1.9 250 0.081 25 0.059 50 0.062 0.8 0.68 0.92
1.4 No. 14 0.0555 0.046 0.18 1.58 400 0.071 40 0.055 80 0.057 0.71 0.6 0.82
1.18 No. 16 0.0469 0.04 0.16 1.34 400 0.063 40 0.049 80 0.051 0.63 0.54 0.72
1 No. 18 0.0394 0.034 0.14 1.14 400 0.055 40 0.042 80 0.044 0.56 0.48 0.64
0.85 No. 20 0.0331 0.0291 0.127 0.977 400 48.76 40 37.73 80 39.36 0.0005 0.00043 0.00058
0.71 No. 25 0.0278 0.0247 0.112 0.822 500 42.63 50 33.82 100 35.14 0.00045 0.00038 0.00052
0.6 No. 30 0.0234 0.0212 0.101 0.701 500 38 50 30.14 100 31.32 0.0004 0.00034 0.00046
0.5 No. 35 0.0197 0.018 0.089 0.589 600 33.23 60 26.85 120 27.82 0.000315 0.00027 0.00036
0.425 No. 40 0.0165 0.0155 0.081 0.506 600 29.95 60 24.2 120 25.08 0.00028 0.00024 0.00032
0.355 No. 45 0.0139 0.0133 0.072 0.427 800 26.45 80 21.95 160 22.64 0.000224 0.00019 0.00026
0.3 No. 50 0.0117 0.0115 0.065 0.365 800 23.7 80 19.66 160 20.29 0.0002 0.00017 0.00023
0.25 No. 60 0.0098 0.0099 0.058 0.308 800 21.02 80 17.44 160 17.99 0.00016 0.00013 0.00019
0.212 No. 70 0.0083 0.0087 0.052 0.264 800 18.79 80 15.59 160 16.08 0.00014 0.00012 0.00017
0.18 No. 80 0.007 0.0076 0.047 0.227 1000 16.85 100 14.24 200 14.65 0.000125 0.000106 0.00015
0.15 No. 100 0.0059 0.0066 0.043 0.193 1000 15.3 100 12.93 200 13.3 0.0001 8.5E-05 0.000115
0.125 No. 120 0.0049 0.0058 0.038 0.163 1000 13.51 100 11.41 200 11.74 9E-05 7.7E-05 0.000104
0.106 No. 140 0.0041 0.0052 0.035 0.141 1000 12.39 100 10.47 200 10.77 7.1E-05 6E-05 8.2E-05
0.09 No. 170 0.0035 0.0046 0.032 0.122 1000 11.27 100 9.53 200 9.8 6.3E-05 5.4E-05 7.2E-05
0.075 No. 200 0.0029 0.0041 0.029 0.104 1000 10.23 100 8.64 250 9.02 5E-05 4.3E-05 5.8E-05
0.063 No. 230 0.0025 0.0037 0.026 0.089 1000 9.18 100 7.76 250 8.09 4.5E-05 3.8E-05 5.2E-05
0.053 No. 270 0.0021 0.0034 0.024 0.077 1000 8.44 100 7.13 250 7.44 3.6E-05 3.1E-05 4.1E-05
0.045 No. 325 0.0017 0.0031 0.022 0.067 1000 7.76 100 6.56 250 6.84 3.2E-05 2.7E-05 3.7E-05
0.038 No. 400 0.0015 0.0029 0.02 0.058 1000 7.09 100 5.99 300 6.31 3E-05 2.4E-05 3.5E-05
0.032 No. 450 0.0012 0.0027 0.018 0.05 1000 6.42 100 5.42 300 5.71 2.8E-05 2.3E-05 3.3E-05
0.025 No. 500 0.001 0.0025 0.016 0.041 1000 5.71 100 4.82 300 5.06 2.5E-05 2.1E-05 2.9E-05
0.02 No. 635 0.0008 0.0023 0.015 0.035 1000 5.33 100 4.51 300 4.75 2E-05 1.7E-05 2.3E-05
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