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Is there any minimal distance recommendation between two USB_A female ports? Between USB_A port and other elements?

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    \$\begingroup\$ Have a look at your collection of USB memory sticks and you'll find that some are very wide - much wider than a standard plug. If you want to cater for those ... \$\endgroup\$
    – Transistor
    Commented Jan 8 at 11:43
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    \$\begingroup\$ AFAIK, there is such a requirement in the USB standard, but I don't have access to it now. At the very minimum, it is twice the width of an A plug's over mold. \$\endgroup\$
    – Lior Bilia
    Commented Jan 8 at 11:46
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    \$\begingroup\$ Many times connector spacing is determines by human factor engineering (yes, there is such a discipline). Considerations include ease of gasping a connector with fingers and room to use a tool (though this is not an issue with USB connectors). \$\endgroup\$
    – SteveSh
    Commented Jan 8 at 13:10
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    \$\begingroup\$ Try fitting a few of these USB load testers! \$\endgroup\$
    – pipe
    Commented Jan 8 at 23:46

2 Answers 2

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The last mechanical specification, USB 3.1 Legacy Cable and Connector specification does not seem to mention a minimum distance between receptacles.

It does specify a maximum overmold width for Type A plugs of 16 mm.
However, as you may have found out, thumb drives do not follow this...

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    \$\begingroup\$ Thanks for reference. Seems that 16x8 mm is maximum for mold size. \$\endgroup\$
    – filimonic
    Commented Jan 8 at 14:43
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No, there aren't any minimal distances to comply to.

It's up to the product designer and common sense rules.

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    \$\begingroup\$ Yeah, it would be embarrassing if two cables wouldn't fit at the same time because of connector shrouds. \$\endgroup\$ Commented Jan 8 at 12:14

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