Vermont Gage 112321270 Class Zz Plus Plug Gage 21.27 Mm

Product Description

The VERMONT GAGE 112321270 is a Class ZZ Plus plug gage designed for go inspection of bored, reamed, or otherwise machined holes with a nominal diameter of 21.27 mm. Manufactured from tool steel with a 10 micro finish, this plug gage holds a tolerance of 0.00508 mm (0.005 mm), making it suitable for verifying hole dimensions against close-tolerance specifications. The overall length is 2.0000 inches. It ships with a Certificate of Accuracy that carries NIST traceability, meeting ASME B89.1 standards. Quality control inspectors, tool room machinists, and metrology technicians use this gage in production and inspection environments.

This plug gage is used in go inspection applications where confirming minimum acceptable hole size is required. It is also suited for setting and calibrating micrometers, verniers, and other precision measuring devices. The 21.27 mm diameter makes it appropriate for medium-bore inspection work in manufacturing, job shop, and quality lab settings. Each unit ships individually and is ready for immediate use after confirming calibration documentation.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm for close-tolerance hole inspection
• Tool steel construction with 10 micro surface finish
• Go inspection configuration verifies minimum acceptable hole diameter
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 standards
• Compatible with use as a setting standard for micrometers, verniers, and other measuring devices

Compatibility

Designed for go inspection of 21.27 mm diameter holes and for use as a setting reference with micrometers, verniers, and other precision measuring devices per ASME B89.1.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin contact. Store in a protective case away from temperature extremes to maintain dimensional stability. Verify the Certificate of Accuracy and traceability documentation before placing the gage into service. Periodic recalibration intervals should be established according to the facility quality management plan.