These two-piece rivets are a printable alternative for using M3 fasteners on my racking. There are square headed and round headed variations of 3 lengths (equivalents of 6mm, 8mm and 10mm long bolts). This is being released in conjunction with an accessory-focused set of files in the base kit for more modularity.
Note that they do not fit as nicely/tightly inside holes that have already been threaded for a bolt. I can't promise they will hold well.
To insert, you can simply push them in one half at a time, or use the tool to insert them in one go. The tool can also be used to remove the fasteners. (Simply slide the slot over the fastener heads and pull). I considered making them in one piece, but you run the risk of failures along layer lines or an unfinished look in holes.
I've done some weight testing and they hold up to weight well (most likely thanks to the beam design). The only downfall of using these vs using M3 fasteners, is that the racking will not be quite as rigid. If you're not planning on putting significant weight on the racking (significantly more than what full filament spools can put on it), these will work great for you.
Each hole requires two halves to be printed!
Note: I've found that they are a little tighter in the upright inserts due to the change in print orientation of the holes. If enough people find them to be too tight, I can make a slightly smaller variation that will fit better in there. A 2.5mm drill bit should would work for sizing the holes if needed.
The rivets are sized at 2.57mm in diameter, with a 2mm deep 3.12mm shoulder (to help locate beams and other hardware.
To assemble the clamp to the tool, a short piece of filament (1.75mm) will do the job. The clamp's main purpose is to help hold the two halves together for installing the fasteners.
The author remixed this model.
This is an add-on Kit for the base system.