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Grind vs turn rms finish

I have a finish requirement that states 64 grind in 1018 tubing. My question is the a crossover or equivalent that would be equal or better if turned. I can maintain a 25 rms finish with a wiper grade of insert.

Paul Cermola
- Lebanon, Kentucky, USA
2004

That looks like a poorly called out spec. I assume it means 64 ra or rms, but there's no way to be certain. Ask your customer what it means.

Jeffrey Holmes, CEF
Spartanburg, South Carolina
2004

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