1-mil precision? That's very good.
I think it is considered standard precision in military aviation, but it does indeed sound very precise to us normies.

I remember watching a documentary about the assembly of the first Hürjet prototype, and the Montage Manager had mentioned that they were drilling 2,500 holes into the wing with a permeability sensitivity of 25 µm (microns) in a 0.1 mm hole (more or less equal with only a tiny difference of 0.4 µm). So, although it is a standard procedure in aviation, these are indeed really tight tolerances for us.

Screenshot 2025-03-18 234330.png Screenshot 2025-03-18 234344.png

Starts around the 10:30 mark, shockingly the auto-translate in English is actually comprehensible:

View: https://youtu.be/ee6AzgMefNk?feature=shared
 
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Would like to get my hands on a scan of those 3-view drawings...

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