On Wednesday, October 28, 2015 at 5:07:53 PM UTC-4, Ignoramus13886 wrote:
Gunner, I just received four 10mm square carbon fiber tubes (with a
round hole inside).


Should be no problem for you. But in long term usages it is important to insulate electrically between the carbon fiber and metals. Carbon is at the very end of the electrochemical series.

Dan