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- 21:00, 14 January 2026 Admin talk contribs created page F4:Flatness Validation (Created page with "{{Author Credit |author=Admin }} == Summary == F4 validates flatness against the ASME logic in the F4 Application and enforces feature-type, modifier, and pattern rules. == Validation rules == * Flatness is valid only for a planar surface or a planar feature of size. * Flatness cannot reference datums. * Flatness cannot be applied to a pattern. * Always prohibited modifiers: diameter, projected tolerance zone, tangent plane, unequally disposed. * Planar...")