@kjacsurveyorcad345 wrote:
.... I'd like to create a block out of this object for use in other drawing, but I don't want it to be hatched. ....
If that's the goal, I suggest you make a dedicated Layer to put the Hatch pattern on, which you can freeze or turn off in the drawing(s) in which you don't want the Hatching, using the same Block in all drawings. Then it won't matter whether the fill is a Hatch pattern, or multiple Solids [which can be fewer than you seem to think, using four-sided ones where applicable], or any other possible way, if there are any.
The only other way that comes to mind that would have the fill in one object as Hatch can [but you didn't do it as one in the sample drawing -- make sure HPISLANDDETECTION is set to 0, and HPISLANDDETECTIONMODE to 1], would be to Presspull the areas to a tiny thickness and Union the results together, but then you would be stuck with using only certain visual styles when you want it to be visible as infill. And you would still need to do something like the Layer suggestion if you want to use the same Block in multiple drawings but have the infill visible in only some of them.
Kent Cooper, AIA