Smooth Wingnut Knob for Hex Socket Thumbscrews

This stylish and comfortable smooth Wingnut Knob has a comfortable grip provides good leverage when tightening and loosening.

It is designed to press-fit onto hexagon socket head cap thumbscrews in these sizes: M4, M5, M6, and M8. 

Each size has it's own plate in the print profile. 

The design is based upon the ISO 4762 / DIN 912 standards, and should fit any screws that comply with the standard. 

The knobs include “crush ribs” that are designed both both make it easier to attach to your thumbscrews, and to make a tight fit with the knurled head. They also include a hexagon shaped toolhead that provides extra grip with the hex socket in your screws. 

The fit is purposefully tight so that it functions well to tighten your thumbscrews. But it is easy to press onto your screws with a clamp, like this one (scale up as necessary). 

Almost any filament should work, except for a soft TPU. 

The shape of the handle comes from ffleurey's excellent Butterfly nut for M6, which I recommend. I modified the center of the nut in order to accommodate ISO 4762 / DIN 912 screws, and resized as appropriate.