Vermont Gage 112120220 Class Zz Plus Plug Gage 20.22 Mm

Product Description

The VERMONT GAGE 112120220 is a Class ZZ Plus cylindrical plug gage machined from tool steel for dimensional go inspection of bored and reamed holes. With a nominal diameter of 20.22 mm and a tolerance of 0.00508 mm (0.005 mm), this gage delivers the close-tolerance accuracy demanded in precision machining and quality control environments. The overall length is 2.0000 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting ASME B89.1 standards. It is installed and used by machinists, quality technicians, and metrology personnel working in production or inspection settings.

This plug gage is suited for go inspection of holes sized to the 20.22 mm nominal diameter in both shop-floor and lab environments. It is compatible with use alongside set micrometers, verniers, and other precision measuring devices as a reference or verification standard. The 10 micro surface finish on the gage diameter supports accurate, repeatable contact with the bore surface, making it appropriate for use in tight-tolerance manufacturing workflows where part acceptance criteria follow ASME B89.1 protocols.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm for high-accuracy go inspection
• Nominal diameter of 20.22 mm for direct hole verification
• Tool steel construction for wear resistance and dimensional stability
• 10 micro surface finish for consistent, repeatable gage contact
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 dimensional gage standards

Compatibility

Designed for go inspection use with set micrometers, verniers, and other precision measuring devices per the manufacturer application data. Verify nominal bore diameter and tolerance class against your part drawing before use.

Installation Notes

Plug gages are handled and used by quality technicians and machinists; no installation in a mechanical system is required. Clean the gage and bore surfaces before use to prevent debris from affecting readings or damaging the gage diameter. Store the gage in its protective case when not in use to preserve the surface finish and dimensional integrity. Calibration intervals should follow your facility quality management system and applicable metrology standards.