Vermont Gage 112320790 Class Zz Plus Plug Gage 20.79mm

Product Description

The VERMONT GAGE 112320790 is a Class ZZ Plus cylindrical plug gage manufactured from tool steel for use in precision dimensional inspection. It measures 20.79 mm in diameter with a tolerance of 0.00508 mm and a 10 microinch surface finish, making it suited for high-accuracy go-inspection workflows. The overall length is 2.0000 inches. This gage is used by machinists, quality control technicians, and metrology personnel to verify bore diameters and hole tolerances on production and inspection floors. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting ASME B89.1 standards.

This plug gage is designed for go inspection applications, including use with set micrometers, verniers, and other precision measuring devices. It is appropriate for both shop-floor spot checks and controlled metrology environments where tight dimensional verification is required. The Class ZZ Plus tolerance class is suited for production-grade inspection of machined bores and similar features where consistent repeatability is expected.

Key Features

• 20.79 mm diameter with 0.00508 mm tolerance for precise go-inspection use
• 10 microinch surface finish for consistent gage contact and accurate readings
• Tool steel construction for durability and wear resistance in production environments
• Meets ASME B89.1 dimensional standards
• Includes Certificate of Accuracy with NIST traceability
• Overall length of 2.0000 inches fits standard gage handle configurations

Compatibility

Designed for use as a go plug gage in conjunction with set micrometers, verniers, and other calibrated measuring devices for bore diameter inspection applications.

Installation Notes

Plug gages are handled and used by metrology technicians and quality control personnel. Store the gage in its protective case when not in use to prevent surface damage and corrosion. Clean the gage and the bore being inspected before use to ensure accurate readings. Do not force the gage into an undersized bore, as this can damage the gage surface and compromise calibration.