275-300mm Metric Outside Micrometer - 3203 Series (Insize)

The 275-300mm Metric Outside Micrometer (3203 Series) from Insize is a precision hand tool for measuring external diameters up to 300 mm with a 0.01 mm graduation. It’s built for machinists, inspectors, engineers, and hobbyists who need reliable, repeatable readings in production, workshop, or lab settings.

Built with carbide measuring faces for longer tool life and better wear resistance in a busy shop, this micrometer stays accurate through daily use. It ships with setting standards to speed up setup and ensure repeatable results (note: setting standards are not included for 0–25 mm sizes).

• 0.01 mm graduation: Precise, easy-to-read measurements that support quick QC decisions and reduce rework.
• Carbide measuring faces: Hardened contact surfaces resist wear from hard parts, delivering longer life and consistent measurements over time.
• Includes setting standards (except 0–25 mm): Speeds up setup and improves repeatability, helping you lock in accurate measurements faster. (Note: not included for 0–25 mm sizes.)

With a generous 275–300 mm measurement span and 0.01 mm resolution, this micrometer supports a wide range of applications—from precision assembly to inspection and quality control. Its durable construction and reliable performance help you complete measurement tasks faster, reduce downtime, and achieve consistent results across batches. Whether you’re calibrating equipment, verifying tolerances, or auditing parts, the 3203 Series Outside Micrometer delivers dependable readings you can trust.