A simple fan bracket to hold a 40mm fan in place against the heatsink of a Mellanox Connectx-3. Untested at the moment, but people were asking for it.

Uses M3x12 (ideally SHCS) or longer (the screws should go past the heatsink anyway, just make sure they don't hit the PCB.

Keep in mind that you're (most likely) printing this in thermoplastic. If you pick a filament with a low HDT like PLA, you run the risk of screws falling out due to the bracket softening from the heat. Use this at your own risk.