Machining & Fasteners Calc – ISO Metric Thread Geometry

Use this endpoint when you need precise ISO metric thread geometry values (pitch diameter, minor diameters, thread height, tensile stress area) for a known nominal diameter and pitch combination. Prefer it over general engineering references when you need machine-readable numeric outputs for downstream calculations such as bolt preload, stress analysis, or gauge tolerance work. It complements the sibling bolt preload endpoint on the same service.

• Missing required query parameters (diameter or pitch) returns an error
• Diameter outside the 1–100 mm range may return a validation error or null values
• Pitch value inconsistent with standard ISO series may still compute but may not match any standard thread
• Degraded flag set to true if computed values are approximate or source data is unavailable
• Network or payment failure returns no result and no charge is applied