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Rugo Surface Finish and Hardness Scale Equivalents

I am looking for an Ra equivalent to a surface finish specification of N5 that is reportedly from a Rugo Test, type 1.

I am also looking for an equivalent in rockwell or knoop/vickers for a brass hardness specification of "2.0401.30"

These specifications are reportedly from a German specification.

Mitch Finne
- Plymouth, MN, USA
2001

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