---

I call it a rigging flange. Not sure the actual name.

I took 2 halves from my console floor to make a full one here.

Here is the finished copy from my project album:

http://www.whalercentral.com/showuser...to_id=1134

They are not available anymore. I would look at rigging boots to keep the water out.
http://thmarine.com/cable-boot#!prett...rettyPhoto