this post was submitted on 08 May 2024
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A millimeter i.e a thousands of a meter.
5 mm isn't 'just over 0.1 mm'. That can't be right.
In the design and manufacture of PCBs (aka circuit boards) a "mil" is a one thousandth of an inch, so it makes sense that's what is being used in this context.
Also the maths check out: 0.005 inches is equal to aprox 0.12mm, "just over 0.1mm".