Vermont Gage 112120320 Class Zz Plus Plug Gage 20.32mm

Product Description

The VERMONT GAGE 112120320 is a Class ZZ Plus cylindrical plug gage used to verify bore diameters in precision inspection work. It measures 20.32 mm in diameter with a tolerance of 0.00508 mm, making it suitable for go inspection applications where close dimensional control is required. The gage body is machined from tool steel and carries a 10 microfinish surface finish. Overall length is 2.0000 inches. A Certificate of Accuracy with NIST traceability is included, supporting quality system documentation requirements. This type of gage is used by quality technicians, machinists, and metrology professionals in shop floor and inspection room environments.

This plug gage is designed for go inspection of bored or reamed holes at 20.32 mm nominal diameter. It is also suitable for setting micrometers, verniers, and other measuring devices requiring a known reference diameter. Typical applications include production inspection of machined parts, incoming material verification, and calibration support for hand measuring tools. The included NIST-traceable certificate supports ISO and AS9100 quality management systems where documentation of measurement traceability is required.

Key Features

• 20.32 mm diameter with 0.00508 mm Class ZZ Plus tolerance for precise go inspection
• Tool steel construction for wear resistance and dimensional stability
• 10 microfinish surface finish for accurate contact with bore surfaces
• Overall length of 2.0000 inches for standard handle compatibility
• Meets ASME B89.1 standards for gage performance and dimensional accuracy
• Includes Certificate of Accuracy with NIST traceability for quality system compliance

Compatibility

Designed for use in go inspection of 20.32 mm diameter bores and for setting micrometers, verniers, and other precision measuring devices requiring a traceable reference standard.

Installation Notes

Plug gages are handled and used by quality technicians and metrologists — no installation in the traditional sense applies. Before use, clean the gage and the bore with a lint-free cloth to remove oils, chips, and debris that could affect measurement accuracy. Do not force the gage into a bore; go gages should pass under the weight of the gage alone or with light hand pressure. Store in the provided case away from temperature extremes to preserve dimensional stability.