tube caps (oil can, silicone tube (310ml cartridge), ...

OpenSCAD model to simply create a cap with a few measurements. 2025-12-24 update: I've added a replacement nozzle that can be screwed to the tube and a screwable cap to just close the tube without the nozzle. Of course you can buy replacement nozzles for the 310ml cartridges, but often you need only one. About the thread in the cap and the nozzle: I've cutted a used nozzle in half and use a permanent marker to highlight the cut. Now the shape of the thread is better visible. I've created a photo, traced the shape with 16 points and recreated them in OpenSCAD (with 32 points). Measurements: ID=13.5mm, OD=15mm, Pitch=2.5mm