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What does the modelled diameter of a threaded hole say?

bruce_fischer469bruce_fischer469 Member Posts: 16 EDU
Hi there,

I don't understand the meaning of the modelled diameter of threaded holes (see e.g. diameter of 2.571 mm for a M3 thread in the screenshot). It is not the standardized core diameter and I guess it was not chosen randomly. Therefore, I would like to ask what does it stand for.

Best regards



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