30mm tube clamp with winged/buttefly nut

thingiverse

Attach a 30mm tube securely with this robust clamp, which relies on a single 20mm M5 screw featuring a hex head and butterfly nut for stability. The clamp is designed to be tall enough so that even when flush against another object, the nut can still be fully turned with ease. For optimal results, print the clamp using PET or ABS plastic. Avoid being misled by the elasticity of these materials; they require minimal tightening to support heavy loads.