On the Craftbot Flow printer, the consumables tube easily slips off the Craftbot's metal mounting bracket.
This flange can firmly fix the consumables pipe to the bracket.

Screw specifications: M3×8 mm.

Please take a look at my new design, in which I also 3D-printed the installation bracket:
https://www.thingiverse.com/thing:5766418

All of my designs can be found at:
https://www.thingiverse.com/thinger13/designs