Drybox Outlet Screw PTFE PC4-M6

This setup allows the filament to remain inside the drybox while being fed to the printer through a PTFE tube. It uses a single M10 screw (10mm diameter), so only one hole needs to be drilled into the drybox. The screw provides a reasonably airtight seal, but for complete airtightness, a rubber gasket would need to be added.

On the outside of the box, the PTFE tube is connected using a PC4-M6 fitting. I reused one from an old Ender 3. If you don't have this connector on hand, there are similar designs available that use a fully printed PTFE tube connector instead.