Gardena barrel coupling

I needed a simple and water tight way to connect a gardena coupling to my water barrel to be able to fill it. this gardena 'bolt and nut' parts are what I came up with.You do need an rubber O-ring for the gardena tip.

The bolt 'flange' has two sealing rings at the outer diameter. You can of course also use a rubber O-ring here as well.

Print with enough fill percentage (I used 30%) so that the print can handle the rotation force when fastening.

Please note that the wall of the barrel ca