ASTM C136 / C136M 19 Standard Test Method for Sieve ...
Note 1: Sieve size is identified by its standard designation in Specification alternative designation given in parentheses is for information only and does not represent a different standard sieve size. Specification E11 cites the following with respect to SI units versus inchpound units as standard. "The values stated in SI units shall be considered standard for the dimensions of ...