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This is going to sound retarded, but M4 screws have a nominal diameter of 4mm, is that the diameter including threads? is there a tolerance beyond 4mm that an m4-accepting hole should include?

TL;DR “how big should a hole be to accept an M4 screw without engaging its threads?”

This separate from the question of how to properly size a 3d printed hole to account for printer inaccuracy/overextrusion, and undersized holes due to polygonal approximation