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Greg,
You may have to scale the part in your slicer before printing. Depending on your filiment, speed, temp, etc your inner hole dimensions can be smaller than you intended. I usually try a scale of 101% -103% first and see how it fits then.
On parts where outside dimensions are critical, I'll remodel the part with a larger hole, which I've done on many parts that get screwed to other parts.
Good luck, and let me know how it turns out.