0.0017. No. 400. 37μm. 37. 0.037. 0.0015. Larger sieve openings (1 in. to 1/4 in.) have been designated by a sieve "mesh" size that corresponds to the size of the opening in inches. Smaller sieve "mesh" sizes of 3 1/2 to 400 are designated by the number of openings per linear inch in the sieve. The following convention is used to ...
![](/images/caleb/202.jpg)