Vermont Gage 112121880 Class Zz Plus Plug Gage 21.88mm

Product Description

The VERMONT GAGE 112121880 is a Class ZZ Plus plug gage designed for go inspection of bored, drilled, and reamed holes with a nominal diameter of 21.88 mm. Manufactured from tool steel with a 10 micro-inch coating finish, this gage provides a tolerance of 0.005 mm (0.00508 mm actual), meeting the dimensional requirements of ASME B89.1. Each unit ships with a Certificate of Accuracy bearing NIST traceability, supporting documented quality-control workflows. Metrology technicians, tool-and-die shops, and precision machining operations use this gage to verify hole conformance during in-process and final inspection.

This plug gage is suited for go inspection applications where hole diameter must be confirmed within tight tolerances. It is used alongside set micrometers, verniers, and other calibrated measuring devices in both shop-floor and laboratory environments. The 2.0 inch overall length fits standard handle assemblies commonly found in inspection toolkits. Its Class ZZ Plus classification indicates it meets or exceeds standard Class ZZ tolerance limits, making it appropriate for general-purpose production inspection in manufacturing facilities.

Key Features

• 21.88 mm nominal diameter for go inspection of precision bored or reamed holes
• Class ZZ Plus tolerance class with 0.005 mm tolerance per ASME B89.1
• Tool steel construction with 10 micro-inch coating finish for wear resistance
• Includes Certificate of Accuracy with NIST traceability for calibration records
• 2.0 inch overall length compatible with standard plug gage handles
• Compatible with set micrometers, verniers, and other measuring devices

Compatibility

Designed for use with standard plug gage handle assemblies and suitable for go inspection applications with set micrometers, verniers, and other measuring devices as stated by the manufacturer.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent contamination and corrosion. Before use, ensure the gage and workpiece are at the same ambient temperature to minimize thermal expansion error. Store the gage in its protective case when not in use and do not force the gage through an undersize hole, as this will damage the gage surface and invalidate calibration.