I have this defined in the config:

User Defined Products Fields v_products_qty_box_status. (I have also tried this without v_)

I have this in my CSV:
v_products_qty_box_status
0

The one product I test this one, continues to show a qty available, which I want to set to hidden.

It seems as if I've done the right things as I've seen in a few good threads.