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Product Specifications:

This series is available in 20 model variants (125-101 through 125-120). Exact pitch range, accuracy, and anvil interchangeability per variant are needs verification against the Mitutoyo datasheet for each specific model code.

A screw thread micrometer is a specialized micrometer used to measure the pitch diameter of external threads. It uses shaped measuring anvils that seat into the thread profile, unlike a standard micrometer’s flat measuring faces.

Screw Thread vs Standard Micrometer

Screw thread micrometers use V-shaped and cone-shaped anvils that seat into a thread’s profile rather than flat measuring faces. Pitch diameter, not outside diameter, is the key dimension a screw thread micrometer is designed to measure. Thread micrometers are typically supplied with interchangeable anvils to match different thread pitches.

Applications

Screw thread micrometers are used in machine shops and thread-manufacturing QA to verify threads meet drawing tolerances. See BTSA’s guide to thread types in metrology and BTSA’s calibration services for thread micrometer calibration.

Want to understand pitch diameter measurement in more depth? See our guide What Is a Thread Micrometer? How It Measures Pitch Diameter.

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