Filament Dry Box Passthrough

thingiverse

I remixed this part from a design I found on anybot3d.com, from an uncited designer. The original part had a shorter, slanted washer and shorter, slanted top surface on the base of the nut. This was to fit the slight slope on the sides of the tote they were using in their dry box build. I'm using the 21 cup cereal container from Rubbermaid and the sides are flat - I needed both the top surface of the nut and the washer to be flat, in order for the parts to align, sit flush, and be airtight. A 16mm hole will need to be made in your tote/container, in order to fit this part. Start smaller (15mm or so) and slowly work your way up - you don't want to make the hole too big, a tight fit is best. The "seal" goes on the inside. It has some flex to it and works well. If it doesn't suit you, a thin bead of silicone or hot glue will also suffice, in place of the seal. If you can get your hole sized just right, you may not find a need for the seal or any sealant. I suggest screwing the PTFE fitting into the screw part, first. Then, push the seal all the way down onto the base of the screw. Next, push the screw through the hole you made in your tote/container, from the inside out. To finish, slip on the washer and screw the nut down tight.