Originally built for Supermicro hotswap trays using Apexio's design. After printing and thinking about it decided a more generic version could be made that would also work on Chenbro and Norco cases. Have not made these for older Supermicro trays that don't have 2.5" screw holes, eventually...
This one lets you use the older SC trays without the 2.5" mounting holes (especially if you use a few dabs of hot-glue or thin double-sided tape):
This is a 3.5" to 2.5" adapter for some Supermicro servers. Specifically, it replaces the bracket in Supermicro part number MCP-220-00043-0N. In other words, printing this allows you to use a 2.5" drive in your current 3.5" drive tray. Note that some 3.5" drive trays do not have 2.5" mounting...
And this one doesn't use any screws to mount it into the sled because it has little nubs (to save you 4 screws!). Just screws for the SSD, which 2 normal generic screws might work fine with the older SC trays that do not have the 2.5" holes:
This is an adapter for a 2.5" drive to fit in a 3.5" sled. Pictured in supermicro hot swap sled.
I suggest printing in PETG for the higher-temps, just in case the SSD gets too warm (PETG can handle up to 80C, whereas PLA can only go to 55C). But PLA could work fine, just might get brittle if you run high-ish temps in your workhorse.
Also, if you're interested, I have more Supermicro/server-related 3D models I've printed/bookmarked: