Doug Miller wrote:

In article , "Michael Hearn Anna Houpt" wrote:

Roughly 25/1000 inch = 1millimeter.

Nope. 1 mm = 0.03937inches.

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Regards,
Doug Miller (alphageek at milmac dot com)

OR
25.4 mm = 1 inch
which may be the source of the confusion - thwe 25
in 25/1000" - 1 mm