Interactive GD&T Quick Reference - ASME Y14.5 Symbols Explained

How It Works

1. Browse or Click a Symbol

   Use category filters or click a local row to view its source status and datum prompts.

2. Check Source Status

   Current-screen rows and legacy/source-gap rows are labeled separately.

3. Review Feature Control Frame Prompt

   Treat the sample frame as a prompt, not drawing approval or standard text.

4. Check Datum Prompts

   Use the datum row as a screening cue before reading the invoked drawing standard.

5. Verify Inspection Method

   Use the inspection note only as a reminder; the drawing, quality procedure, and metrology plan control acceptance.

Built For

• Machinists screening GD&T callouts before drawing and standard review
• CMM operators checking datum and legacy-symbol prompts before programming
• Quality inspectors identifying source gaps before acceptance decisions
• Manufacturing engineers preparing questions for design or metrology review
• Designers checking whether a symbol choice needs standard/customer review
• Students learning local symbol categories with source warnings visible

Features & Capabilities

12 Current-Screen + 2 Legacy Rows

Local row set for Straightness, Flatness, Circularity, Cylindricity, Profile of Line/Surface, Angularity, Perpendicularity, Parallelism, Position, Circular/Total Runout, plus legacy/source-gap rows for Concentricity and Symmetry.

Interactive Symbol Grid

Visual grid organized by category with click-to-expand detail panels.

FCF Prompt Diagram

Feature control frame prompt showing common compartments without replacing the drawing or standard.

Material Condition Modifiers

MMC, LMC, and RFS reminders with source-boundary warnings.

Inspection Notes

Local inspection reminders that must be checked against the drawing, procedure, equipment capability, and qualified metrology review.

PDF Export

Export a source-aware PDF with warnings and ASME source pointers.

Assumptions

• Rows are local training summaries and source pointers, not reproduced ASME Y14.5 standard text
• Feature control frame examples are prompts only and do not approve a drawing callout
• Material condition modifier notes must be checked against the invoked standard, feature type, and drawing limits
• Inspection notes are local reminders; accepted measurement method depends on the drawing, procedure, equipment, and uncertainty budget
• Concentricity and Symmetry are retained as legacy/source-gap rows for older drawing review
• Datum reference frame and datum feature simulator details require drawing-specific review

Limitations

• Does not reproduce ASME Y14.5 definitions, figures, tables, defaults, examples, or complete rule text
• Does not decide whether ASME Y14.5, ISO GPS, customer notes, or another revision governs a drawing
• Not a substitute for licensed standard access, professional GD&T training, qualified design review, or metrology review
• Does not include validated tolerance stack-up, statistical tolerance, gauge design, or CMM programming methods
• Does not establish datum reference frames for complex, partial, movable, or customized datum features
• Does not approve composite tolerancing, projected zones, profile requirements, or simultaneous requirements

References

• ASME Y14.5-2018 (R2024) - Dimensioning and Tolerancing source pointer
• ASME Y14 standards family source pointer
• Invoked drawing standard, revision block, drawing notes, purchase order, and customer requirements
• Site quality procedures, inspection plan, metrology equipment capability, and measurement uncertainty budget
• Supplier/customer interpretation records or qualified GD&T professional review where required
• ISO GPS standards only where the drawing or contract invokes them

Frequently Asked Questions