Split Lead Nut

I added a negative-space module to the Thread Library today. This new module will create a negative space version of a thread, taking care of all the clearance calculations for you. All you need to do is pass it the same parameters as the thread it is meant to screw onto.

I also added a module to create a hexagonal nut that screws onto any threaded rod with the same parameters, but as a more interesting example, I chose to demo the new capability with a split lead nut.

Print and clamp the