Vermont Gage 112120840 Class Zz Plus Plug Gage 20.84mm

Product Description

The VERMONT GAGE 112120840 is a Class ZZ Plus plug gage designed for dimensional inspection of bored holes, drilled passages, and machined features requiring precise go-inspection verification. Manufactured from tool steel with a 10 micro finish, this plug gage measures a nominal diameter of 20.84 mm and holds a tolerance of 0.00508 mm. Each unit ships with a Certificate of Accuracy carrying NIST traceability, confirming the gage meets ASME B89.1 standards. It is suited for quality control technicians, machinists, and metrology professionals working in production or inspection environments where reliable, repeatable dimensional verification is required.

This plug gage is used as a go-type inspection tool for checking hole diameter conformance on machined parts. It is also compatible with setup and verification of micrometers, verniers, and other precision measuring devices. Applications span manufacturing shops, tool rooms, and quality labs where ASME B89.1-compliant inspection tooling is specified. The overall length of 2.0000 inches makes it easy to handle in standard bench or floor inspection setups. It is equally appropriate for incoming inspection, in-process checks, or final acceptance of machined components.

Key Features

• Class ZZ Plus tolerance rating of 0.00508 mm for high-accuracy go inspection
• Tool steel construction provides durability and wear resistance in repeated-use inspection applications
• 10 micro surface finish on the gage diameter ensures consistent contact and accurate readings
• Includes Certificate of Accuracy with NIST traceability for documentation and audit compliance
• Conforms to ASME B89.1 standards for plain plug gages
• Overall length of 2.0000 inches supports convenient single-hand operation

Compatibility

Designed for go inspection of machined holes at 20.84 mm nominal diameter. Also suited for setting and verifying micrometers, verniers, and other precision measuring devices per the stated application data.

Installation Notes

Plug gages are handled and used by quality control technicians and machinists; no power source or mechanical installation is required. Clean the gage and the workpiece bore thoroughly before use to prevent contamination from affecting measurement results. Do not force the gage through an undersize hole, as this can cause gage or workpiece damage. Store the gage in its protective case when not in use to preserve the finish and dimensional integrity.