Raspberry Pi 4 + Geekworm P388 rack-mount bracket

Rack-mount bracket for Geekworm P388 Raspberry Pi 4 case (and others)
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updated January 29, 2025

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Rack-mount bracket for the Geekworm P388 Raspberry Pi 4 case.

Probably also works with other cases that have a similar footprint, like the P173 (Pi 4) and P252 (Pi 3), but I haven't tested. Note that these cases have their two right-side screws offset from the actual Pi mounting holes. Many other cases, including the P573 (Pi 5), use the Pi hole pattern directly, so they won't be fully compatible with this bracket.

The bracket screws directly into the case using four M2.5 screws. The ones that come with it aren't long enough; I used some 15mm ones I had. Washers recommended.

All I/O is accessible, including the SD card and GPIO slots.

The left side of the bracket has a slotted ‘shelf’ to secure/relieve the power cable. This works best with cables that have a 90° plug. There is also a small loop on the right side in case you want to secure something there, or in case it isn't supported well enough using just the rack screws.

I only created a right-mounted bracket. A proper left-mounted one probably needs a slightly different design to prevent the cables from fouling against the rack. But this one should also work very well upside down if you need it on the left.

The example in the photos was printed using JLCPCB's MJF nylon service. There is just a tiny bit of sag with this material. I think PLA works a little better at first due to its stiffness but it will probably sag worse over time. I only tried it very briefly.

PS: Please note that I originally designed this with MJF or SLS printing in mind. It prints OK with FDM, but could definitely be optimized better for it. Using a hexagon or diamond pattern for the side wall is one improvement I can think of.

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