M3 Thread Inspection Appendix

Important: Thread forms should be positioned on the measuring surface in a “mostly” vertical or horizontal orientation. A +/- 5 degree orientation is recommended.

The Thread Feature

The thread feature measurement contains 6 coefficient results.

O=Outside(Major) Diameter // R=Root(Minor) Diameter // P=Pitch Diameter // L=Lead

c=Crest Crest Truncation // r=RootTruncation

Graphical representation of the thread coefficient results

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