Designed to mount a noctua NF-A14 industrialPPC for wind simulation to the side of the wheel uprights of a sim rig. Produces a pretty good interference fit with the rubber grommets squeezed between the part and the fan walls, additionally fixate with noctua silent fan mount thing.

Onshape: https://cad.onshape.com/documents/82974d3c0521ec3ee1c626b5/w/5e4bb7b833701634d56d27f8/e/0cbfdf1a4c5c437c0a6d54f4?renderMode=0&uiState=65b529c86da5e638ca9a8054