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Thread Calculator
Calculate screw thread pitch, tap drill size, and dimensions
Thread Standard: Thread pitch is calculated as $1 \div \text{TPI}$. Estimated tap drill size for unified threads is approximately $\text{Major Diameter} - \frac{1}{\text{TPI}}$.
Thread Parameters & Dimensions
Calculation Results
⚠️ Always consult standard machinery reference charts (like Machinery's Handbook) for precise class of fit tolerances before tapping critical metal parts.