1u 19in Network Rack Blank

Update July 2025: I added a version without venting, instead it has divots that do not go all the way through. This version really stands out if you print the full divot in an accent color. But you can also just print a few layers in a different colour if you want it to be more subtle. 

What it is
I wanted a network blank that was both aesthetically pleasing and could be assembled into larger panels for strength. There are lots of options out there but all of them just didn't feel quite right for me. I made this one so you can print it with a nice two tone look without the need for an AMS, just switch filament on Layer 5. It still looks like several 1u panels, but they need less rack screws and feel more solid for filling large gaps. I followed the 1u specs to the letter except I elongated the mounting holes a bit more than most to allow a bit more flexibility. 

Attachment Methods

#6-32 Computer Case /HDD Screws - I found most work, but some are a bit too short. Using any bolt in the center attachment will show a bit, but its minimal. These work great for attaching 1u units together to make 4u or even 6u blanks. Hand tighten carefully or you will strip the threads and have to use another method.

Heat Stakes - small pieces of filament you put through the small holes, then melt the ends with a soldering iron while squeezing the parts together.

M3 Bolt / Nut - Fits a bit loose, so some filament through the small holes can help to keep perfect alignment.

Glue - I wouldn't trust it on its own, but if you don't have a soldering iron you can just glue in some filament stakes along with the glue on the surfaces.

Or any combination: I found a bit of super glue with heat stakes worked great and didn't use up any hardware.

Remixes

I have included f3d and step file so you can tweak for your own needs or aesthetics.