Starrett 68031 Outside Micrometer 6 in Ratchet Stop

Product Description

The STARRETT 68031 is a mechanical outside micrometer built for precise external dimensional measurement in trade and industrial applications. It covers a 6-inch measurement range with a graduation of 0.0001 inches and an accuracy of 0.0001 inches, making it suitable for high-tolerance work in machining, fabrication, and inspection environments. The ratchet stop thimble delivers consistent measuring force to improve repeatability across readings. A satin chrome finish resists corrosion and reduces glare during use. This tool is handled by machinists, pipefitters, millwrights, and quality-control technicians who require reliable, repeatable linear measurements on the job.

The STARRETT 68031 is used wherever precise external measurements of workpieces, pipe walls, shafts, or fittings are required. It is well-suited for residential and commercial fabrication shops, mechanical contracting environments, and quality assurance workflows. The flat anvil design accommodates a wide range of flat and cylindrical workpiece geometries. Solid carbide measuring faces extend service life under frequent use. The included lock nut and wrench allow the spindle to be secured once a measurement is taken, preventing drift during transfer or recording.

Key Features

• 6-inch maximum measurement range with 0.0001-inch graduation for high-precision readings
• Ratchet stop thimble provides consistent, repeatable measuring force
• Solid carbide measuring faces resist wear during extended use
• Ring-type lock nut with included wrench secures spindle position after measurement
• Flat anvil and 0.25-inch anvil diameter accommodate a variety of workpiece profiles
• Satin chrome finish reduces glare and provides corrosion resistance

Compatibility

Designed as a general-purpose mechanical outside micrometer suitable for external measurement tasks in machining, fabrication, and mechanical trade applications.

Installation Notes

Outside micrometers require no installation but should be calibrated against a known standard before use. Clean measuring faces with a lint-free cloth and verify zero setting before taking measurements. Store the micrometer with the anvil and spindle faces slightly separated to prevent thermal distortion. Comply with applicable shop safety and metrology standards when using precision measuring tools in industrial environments.