Marine cable through fitting for spalshwell

I needed something to seal wire into the the large hole in my splash-well (above the water line) that was needed to pass the connector through. I found this part:
http://www.jamestowndistributors.com/userportal/show_product.do?pid=8925
And decided that this is something I can print and save some $$$$. Started with the makerbot knurled nut since it was the right size and I was too lazy to make my own threads that print well.

I used the solid nut to get more torque. The split nut tends