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What is an N8 finish?

The specification is a surface finish designation. The equivalent US (english) designation is (RMS), usually a number followed by a square root symbol.

I need to know what a N8 finish is for machining purposes. The spec is on a foreign drawing. All dimensions in metric.

Tyson Brady
Monalex Manufacturing Inc. - Douglas, Massachusetts
2004

Roughness Grade No N8 is equivalent to Ra3.2µm.

Refer http://www.predev.com/smg/specification.htm

Izhar

Mohammed.Izhar-ul-haq
Unisteel Technology Limited - Singapore
2004

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