Vermont Gage 112321450 Class Zz Plus Plug Gage 21.45mm

Product Description

The VERMONT GAGE 112321450 is a Class ZZ Plus plug gage designed for precision dimensional inspection of bored, reamed, or drilled holes. It checks whether a hole falls within acceptable go-tolerance limits, making it a standard tool for machinists, quality control technicians, and toolroom personnel. The gage measures a nominal diameter of 21.45 mm with a tolerance of 0.005 mm, and is manufactured from tool steel with a 10 micro-inch finish. Each unit ships with a Certificate of Accuracy traceable to NIST standards, meeting ASME B89.1 requirements.

This plug gage is suited for go inspection applications in manufacturing, toolroom, and quality assurance environments. It is compatible with use alongside micrometers, vernier calipers, and other precision measuring devices for calibration checks and process verification. Typical applications include incoming inspection, in-process gauging, and final inspection of machined components where tight hole tolerances must be verified consistently and quickly.

Key Features

• Class ZZ Plus tolerance rating with 0.005 mm tolerance for reliable go inspection
• 21.45 mm nominal diameter for precise hole verification
• Tool steel construction for durability and wear resistance in production environments
• 10 micro-inch surface finish for consistent, repeatable contact with the workpiece
• Meets ASME B89.1 standards for dimensional gaging
• Includes Certificate of Accuracy with NIST traceability for documentation and calibration records

Compatibility

Designed for use in go inspection applications alongside micrometers, verniers, and other precision measuring devices. Suitable as a reference standard or working gage in any toolroom or quality inspection setup requiring ASME B89.1-compliant plug gages.

Installation Notes

Plug gages should be handled by metrology or quality control personnel following standard gage handling practices. Keep the gage clean and lightly oiled when not in use to prevent corrosion of the tool steel. Never force the gage into a hole; if resistance is encountered during go inspection, the hole is undersize and further machining is required. Store in a protective case away from abrasive materials to preserve the precision finish.