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- 21:10, 14 January 2026 Admin talk contribs created page F4:Cylindricity Validation (Created page with "{{Author Credit |author=Admin }} == Summary == F4 validates cylindricity against the ASME logic in the F4 Application and enforces feature-type, modifier, and pattern rules. == Validation rules == * Cylindricity is valid only for a cylindrical surface. * Cylindricity cannot reference datums. * Cylindricity cannot be applied to a pattern. * FOS linkage is not allowed for cylindricity in F4. * Prohibited modifiers: diameter, LMC, MMC, projected tolerance z...")