In article 0087e6ea-86fa-4e8b-9540-bb74977cec89
@d4g2000vbm.googlegroups.com, (N8N) says...

But then there's weird stuff like pedal threads (9/16" but neither NC
or NF, and the left side is left hand thread) and derailleur hanger
bolts (I think 10mm, but not a pitch that is in my standard tap and
die set...)

You need a small lathe with good gearing. You can cut any thread on a
lathe.

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