30mm tube clamp with winged/buttefly nut

Clamp for a 30mm tube.
Uses a single 20mm M5 screw (hex head) with a butterfly nut.

The clamp is tall enough so that the nut can be fully turned even when the clamp is flush against another object.

Print preferably in PET or ABS. Don't be fooled by the elasticity of the plastic: it needs very little tightening to hold on heavy loads.