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Particle Size Conversion Chart

B.S.S. MESH A.S.T.M. MESH I.S.S. MESH MICRON IN NM
4 5 - 4000 4.00
6 7 280 2812 2.81
8 10 200 2057 2.05
10 12 170 1680 1.68
12 14 150 1405 1.40
14 16 120 1240 1.20
16 18 100 1003 1.00
18 20 85 850 0.85
22 25 70 710 0.71
30 35 50 500 0.50
36 40 40 420 0.42
44 45 35 355 0.35
52 50 30 300 0.30
60 60 25 250 0.25
72 70 20 210 0.21
85 80 18 180 0.18
100 100 15 150 0.15
120 120 12 125 0.12
150 140 10 105 0.10
170 170 9 90 0.09
200 200 8 75 0.075
240 230 6 63 0.063
300 270 5 53 0.053
350 325 4 45 0.045
400 400 - 37 0.037
500 500 - 35 0.025
625 625 - 20 0.020

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