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Pipe Thread 3D Printable Models
D30 Water barrel screw connection 3/4 1 Regentonne
MakerWorld
Gorilla
1/2 NPT to 3/4 GHT/NPT Multi-Thread Pipe Fitting
Thingiverse
sccpsteve
Sprinkler Nozzle Thread to 1/2" NPT Adaptor
MakerWorld
7877ray
pipe 3/4" thread reduction to pet bottle
MakerWorld
Yakuza