Printing coarse threads I have a makerbot, and am using their slicer program. The part I am printing has an extremely coarse thread, 5 threads per inch with a 2 mm thread height. The thread face is at a 30 degree angle (15 degrees of overhang)

I have printed external threads like this without issue and without support material before for various gardening tools (a flow straightener for example). I'm now trying to print an internal threaded part however the rest of the part needs to have support. I've played with the settings in the makerbot software but can't find a combination that will acomplish  my goal. 

I'm looking for an idea, a setting, or an alternate way of printing the threads without support,  but still have supports for the other sections of the part that I know do need them. 

Perhaps there is an alternate software that can do something like this, or is best practice to modify the part to have  weak structural elements to support the extremely overhanging sections that I'll then break off afterwards and print the part with no supports?
There are some software tools that let you manually design support structures so you can target the areas that need them, and avoid others.

For example, Meshmixer can be used to add supports into your STL. I believe you still use a separate slicer.

Some slicers also have the ability to manually add support. I have found that CraftWare and Simplify3D have this kind of feature.