thou
A thousandth of an inch is a derived unit of length in an inch-based system of units. Equal to 0.001 inches, it is normally referred to as a thou /ˈθaʊ/, a thousandth, or (particularly in the United States) a mil.
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thousandth
thousandths
mil
thou
mils
meter / ( .0254 / 1000 )
meter × ( .0254 / 1000 )