Starrett 56323 Screw Thread Micrometer 0-25mm

Product Description

The STARRETT 56323 is a mechanical screw thread micrometer designed for precise external thread measurement in the 0 to 25mm range. It features a plain thimble and a satin chrome finish for durability and readability under shop conditions. Graduation is 0.01mm, and accuracy is rated at 0.004mm (0.0002 inches). Operation is fully mechanical with no digital counter, making it reliable in environments where battery-powered instruments are impractical. The included anvil is purpose-built for screw thread contact geometry. This instrument is used by machinists, tool room technicians, and quality control inspectors who require repeatable, traceable measurements of threaded fasteners and workpieces.

The STARRETT 56323 is suited for use in machine shops, tool rooms, and manufacturing environments where screw thread diameter verification is part of the inspection process. It is appropriate for both production and maintenance settings. The 0 to 25mm range covers a wide variety of common metric fastener and part thread profiles encountered in precision machining and assembly work. No rotating spindle is present, which simplifies handling during single-handed measurement tasks.

Key Features

• Mechanical operation — no batteries or digital components required
• 0.01mm graduation for fine, readable incremental measurement
• Accuracy of 0.004mm (0.0002 inches) for precision thread inspection
• Plain thimble design for straightforward, consistent grip
• Includes anvil suited for screw thread contact geometry
• Satin chrome finish reduces glare and resists corrosion in shop environments

Compatibility

Designed as an OEM-style mechanical screw thread micrometer for use in metric measurement applications requiring a 0 to 25mm measurement range.

Installation Notes

This instrument is handled and used by machinists and quality control technicians rather than installed in a system. Prior to use, verify the micrometer reads zero correctly at the closed position using the supplied anvil and adjust as needed per standard calibration procedure. Store in a protective case away from extreme temperatures and humidity to maintain calibration integrity. Do not overtighten the thimble during measurement, as this can introduce measurement error or damage the instrument.