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PWB drawing note

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#63130

PWB drawing note | 15 November, 2010

I'm working with an aerospace PWB fab drawing from 1994. It contains a note saying "CRUSH ZN .250 DIAMETER" with an arrow pointing to a countersunk or counterbored hole. Can anyone tell me exactly what this means?

Thanks

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#63298

PWB drawing note | 15 December, 2010

Could it be "crush 2N"? 2 Newtons would specify the setting for the press to production folk.

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