RS PRO Metric Internal Micrometre 12 mm to 20 mm Measurement Range ±0.004 mm Accuracy 0.001 mm Resolution 667-3938

RS PRO 667-3938 is a metric internal micrometre crafted for precise measurement of bore depths ranging from 12 mm minimum to 20 mm maximum. This tool is designed specifically for industrial and automotive applications requiring high accuracy in measuring internal diameters such as cylinder bores and pipe depths.

The micrometre features an accuracy of ±0.004 mm coupled with a fine resolution of 0.001 mm, supporting precision engineering requirements. Its internal 3-point measurement design improves contact reliability inside bores.

Constructed with tungsten carbide anvils, the tool offers superior impact and corrosion resistance, promising up to 100 times longer service life than standard steel anvils. The satin chrome finish on the thimble enhances durability and usability.

The included extension rod allows measurements in extra-deep bores, making it versatile for varied industrial environments. A calibration ring gauge is supplied to facilitate resetting the anvils back to zero easily, ensuring ongoing measurement accuracy.

No batteries are required, simplifying maintenance and operation. The product comes protected in a robust storage case, ideal for secure transportation and storage on site or in workshops.

Commonly used in automotive manufacturing, especially for engine block hole measurements, this micrometre ensures components fit tightly and operate efficiently. RS PRO represents a trusted brand recognized globally for quality tools tested against stringent standards, guaranteeing reliability and professional-grade performance.

Accuracy of ±0.004 mm ensures reliable and precise readings. Resolution of 0.001 mm allows for fine measurement discrimination. Includes tungsten carbide anvils for enhanced durability and corrosion resistance. Extension rod for measurements in extra-deep bores.

Calibration ring gauge for easy zero adjustment of anvils. Thimble with satin chrome finish for increased hardness. Non-battery operation supports maintenance-free use. Comes with a durable storage case for protection. Ideal for automotive applications such as engine block bore measurements.

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