Gardena Nut 1/2"
thingiverse
Gardena doesn't sell the nuts for their hose connectors separately, but after some years of usage some of them simply cracked. There are several proposals for replacements in Thingiverse, but I wanted one that looks more like the original (old design), including the knurl. The picture shows the a 1/2 inch hose connector with original cap/nut in grey and the replacements in white, printed in PETG (but PLA would probably okay as well. For a real replacement print in grey color:-) For those of you who want to design their own, the pitch of the thread is 1.5mm and the outer diameter 28mm. (took me some attempts to get the thread right)
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