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

enter image description here

  • 1
    \$\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
  • 1
    \$\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
  • 1
    \$\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
  • 1
    \$\begingroup\$ Try fitting a few of these USB load testers! \$\endgroup\$
    – pipe
    Commented Jan 8 at 23:46

2 Answers 2


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...

  • 1
    \$\begingroup\$ Thanks for reference. Seems that 16x8 mm is maximum for mold size. \$\endgroup\$
    – filimonic
    Commented Jan 8 at 14:43

No, there aren't any minimal distances to comply to.

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

  • 2
    \$\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

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.