Air hose "Industrial Quick Disconnect" QD Dust Cap

I couldn't find a dust cap for air hose I/M ("Industrial"?) QD connectors, so I made one as my first project. This works fine, but may need some tweaks so it should be customizable!

I use it with brass male I/M QD I have bought from Harbor Freight and sit on the end of my air tools.

I cleaned up the scad a bit, but it was still my first and it's terribly written.

Prints without supports. Tested with PLA.