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The thou, or mil, is most commonly used in engineering and manufacturing in non-metric countries. For example, in specifying: The thickness of items such as paper, film, foil, wires, paint coatings, latex gloves, plastic sheeting, and fibers For example, most plastic ID cards are about 30 thou (0.76 mm) in thickness.
Conversions between units in the metric system are defined by their prefixes (for example, 1 kilogram = 1000 grams, 1 milligram = 0.001 grams) and are thus not listed in this article. Exceptions are made if the unit is commonly known by another name (for example, 1 micron = 10 −6 metre).
thou or mil (1 ⁄ 1000 of an inch) ... the length two and a half meters is usually recorded as 2500 mm or 2.5 m; it would be considered non-standard to record this ...
[1] [2] The basis of the system is the thou (or mil in US English), or 0.001 in. Sizes are specified as wire diameters, stated in thou and tenths of a thou (mils and tenths). The wire diameter diminishes with increasing size number. No. 7/0, the largest size, is 0.50 in. (500 thou or 12.7 mm) dia.,
The millimetre (SI symbol: mm) is a unit of length in the metric system equal to 10 −3 metres ( 1 / 1 000 m = 0.001 m). To help compare different orders of magnitude , this section lists lengths between 10 −3 m and 10 −2 m (1 mm and 1 cm).
A circular mil is a unit of area, equal to the area of a circle with a diameter of one mil (one thousandth of an inch or 0.0254 mm). It is equal to π /4 square mils or approximately 5.067 × 10 −4 mm 2 .
Hints and the solution for today's Wordle on Tuesday, February 4.
1 thou is about 0.025 mm. 10 thou is about 0.25 mm. 1 tenth is about 2.5 μm. 1 μm can be thought of as half a tenth (although a bit smaller, 40 millionths versus 50 millionths). 1 mm is about 40 thou. I reinstated it but it was deleted again because "Not a textbook". Yet just above the deleted lines was the following: 1 thou is equal to: