Am I wrong with the sizes or are they just hopeless to find?
You're not wrong, and they are pretty much impossible to find in general fastener listings because M9 is almost never used for anything other than bicycle front hub axles.
That was what I thought! Thanks!
@sbajda started
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You're not wrong, and they are pretty much impossible to find in general fastener listings because M9 is almost never used for anything other than bicycle front hub axles.