On Thu, Oct 13, 2016 at 4:12 PM, jim stephens <jwsmail at jwsss.com> wrote:
If these are the connectors that can have keys
inserted between every
connector, the small difference would be significant as those would not
align between a metric connector and an English (inch) board. The
electrical connections would line up w/o any keying as you say.
Assuming you use the center as your reference point, on the maximum
width (86-pin) connector, nothing is going to be off by more than 5.25
mils. That's not enough to cause a problem with keying.