Vermont Gage 112121700 Class Zz Plus Plug Gage 21.7mm

Product Description

The VERMONT GAGE 112121700 is a Class ZZ Plus plug gage designed for precise bore and hole diameter inspection in quality control and metrology applications. It measures 21.7 mm in diameter and is manufactured from tool steel for long service life and dimensional stability. The gage carries a 0.005 mm (0.00508 mm actual) tolerance and a 10 microfinish surface, making it suitable for Go inspection work where accurate internal diameter verification is required. Each unit ships with a Certificate of Accuracy traceable to NIST, supporting documented inspection processes. It meets ASME B89.1 standards.

This plug gage is used in machine shops, inspection departments, and manufacturing environments where internal bore dimensions must be verified to close tolerances. It is appropriate for use as a Go gage in qualifying machined bores and is also compatible with setup and calibration of micrometers, verniers, and other precision measuring devices. Typical users include machinists, quality control technicians, and metrology professionals working in both production and tool room settings.

Key Features

• 21.7 mm diameter with 0.005 mm tolerance for precise Go inspection
• 10 microfinish surface for accurate, repeatable contact with bore walls
• Tool steel construction for durability and dimensional stability
• Meets ASME B89.1 dimensional standards
• Includes Certificate of Accuracy with NIST traceability for documented QC processes
• Compatible with setting micrometers, verniers, and other precision measuring devices

Compatibility

Designed for Go inspection of 21.7 mm diameter bores. Also suitable for setting and calibrating micrometers, verniers, and other precision measuring devices as stated by the manufacturer.

Installation Notes

Plug gages should be handled and stored carefully to prevent surface damage that could affect measurement accuracy. Before use, clean the gage and the bore being inspected to remove debris, oil, or chips. Apply light gage oil when inserting into bores to reduce wear on the gage surface. Inspection work should be performed by qualified personnel following applicable shop or laboratory calibration procedures.