A thou (pronounced /ˈθaʊ/, also known as a mil or point, is a unit of length equal to 0.001 inch (a "milli-inch", one thousandth of an inch). The equivalent SI unit is the micrometre.
The introduction of the thou in 1844 is generally attributed to Joseph Whitworth.
The mil or thou is sometimes used in engineering and in the specification of:
In the United States, as the metric system became more common thou began to replace mil among technical us...
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A thou (pronounced /ˈθaʊ/, also known as a mil or point, is a unit of length equal to 0.001 inch (a "milli-inch", one thousandth of an inch). The equivalent SI unit is the micrometre.
The introduction of the thou in 1844 is generally attributed to Joseph Whitworth.
The mil or thou is sometimes used in engineering and in the specification of:
In the United States, as the metric system became more common thou began to replace mil among technical users due to the possible confusion with millimeters. However, the mil is still in common use in the United States for the thickness of plastic sheeting or bags.
In the United States, the mil/thou is still in use extensively in certain industries such as in the manufacture of printed circuit boards (PCBs) and for tolerance specifications on hydraulic cylinders.
A "mil" is equal to one thousandth of an inch. So, 30 mils, most common thickness of most plastic ID cards, is equal to 0.03 inches (0.76 mm).
The plural of thou is also thou; e.g., a...
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