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The only tolerancing I'm aware of is in IPC-2222. Table 5-3 lists three levels
of tolerancing in metric. The approx conversions are level A +/- .010, level
B .008, level C .0056. See the spec for all of the details.
Don Vischulis
>Is there an IPC specification that describes what the standard is for board
>outline and mounting hole location dimensional tolerances. I thought it was
>+/-.010, but I can't find it anywhere.
>
>Thanks,
>Spencer Davis
>Sr. Manufacturing Engineer
>Spinnaker Networks, Inc.
>
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