Fan snap ring
thingiverse
This is a tiny snap ring that fits snugly onto the axle of the fan, and its small size makes it ridiculously easy to misplace - a frustrating experience for anyone who has ever had to deal with it. Due to its tendency to slip away unnoticed, I won't be able to post a picture unless I stumble upon one or decide to fix my fan first. Hopefully, I'll find the ring before too long, but if that doesn't happen, printing another one might not be a bad idea after all.
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