Spi CMS160726111 Screw Thread Micrometer 2 to 3 Inches

Product Description

The SPI CMS160726111 is a mechanical screw thread micrometer designed for precision thread measurement in the 2 to 3 inch range. It features a ratchet stop thimble for consistent measuring pressure and delivers a graduation of 0.001 inches with an accuracy of plus or minus 0.0002 inches. The interchangeable anvil design allows the tool to be configured for different thread forms without replacing the entire instrument. It is calibrated to NIST-traceable standards and ships with a short-form certificate of calibration, making it suitable for quality-controlled shop environments. Machinists, tool and die makers, and metrology technicians are the primary users of this instrument.

This micrometer is used in machine shops, manufacturing facilities, and inspection departments where external thread dimensions must be verified to tight tolerances. The 2 to 3 inch measurement range covers a wide variety of medium-to-large threaded fasteners, bolts, and threaded components. It is appropriate for both production-floor spot checks and formal inspection procedures where NIST-traceable documentation is required. The mechanical operation requires no batteries or data cables, making it reliable in environments where electronic instruments are impractical.

Key Features

• Measurement range: 2 to 3 inches with 0.001 inch graduation
• Accuracy of plus or minus 0.0002 inches for high-precision thread inspection
• Ratchet stop thimble ensures repeatable, consistent spindle pressure
• Interchangeable anvil design adapts to multiple thread forms
• NIST-traceable calibration with short-form certificate of calibration included
• Includes protective case and standards for field or bench use

Compatibility

Designed as a standalone mechanical screw thread micrometer for inspecting externally threaded parts in the 2 to 3 inch range. Interchangeable anvils allow adaptation to various thread profiles; specific anvil sets are sold separately and not included with this unit.

Installation Notes

This instrument requires no installation. Calibration and use should be performed by a qualified machinist or metrologist following applicable shop metrology procedures. Store in the included case when not in use to protect the measuring faces and anvils. Do not expose the instrument to excessive heat, shock, or corrosive environments, as these conditions can affect calibration integrity.