Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4945519.
i have a centralized vacuum dust cleaner from a known canadian brand, the vacuum cleaner is ok, but the plugs wear down real fast, so i designed my own, to cut down replacement cost....
since i only use the "construction" variant (without shiled to hide the plug) i desinged only those, but its done in openscad, so you can add your own!
[EDIT] i got an unused flexible with broken handle lying around, and needed an adapter to add my workshop machines temporarily to the vacuum-circuit (they have their own cyclonic separator) so i build an adapter from straight 5cm pipe to wall plug using the original, threaded, tube, enjoy! In the scad you have also only the nut for the tube, before printing all, please, and really recommended, print out an at least 25mm (to catch at least 3 spires) test- nut to check with your tube!
if there's interest i can open up a git, would be nice to have some cooperative work (instead of some remixes... that are hard to follow and mantain....)
so have fun!