Vermont Gage 111312250 Class Zz Plus Plug Gage 0.1225 in

Product Description

The VERMONT GAGE 111312250 is a Class ZZ Plus plug gage designed for precise dimensional inspection of bored holes, drilled passages, and machined features. Built from tool steel with a 10 microfinish surface, it measures a nominal diameter of 0.1225 inches with a tolerance of 0.0002 inches. This level of precision makes it a reliable go-inspection instrument used alongside micrometers, verniers, and other precision measuring devices. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting ASME B89.1 standards. Machinists, toolroom technicians, and quality control inspectors rely on this type of gage for production verification and in-process inspection tasks.

This plug gage is suited for go inspection applications in manufacturing, toolroom, and quality assurance environments. It is used to verify that a hole or bore falls within the acceptable minimum size limit. Typical applications include checking drilled, reamed, or bored holes in metal and engineered components. The 0.1225 inch diameter and overall length of 2.0 inches make it practical for both bench inspection and floor-level production checks. Compatible with standard gage handle systems used in light-diameter inspection work.

Key Features

• Class ZZ Plus tolerance class for go-plug inspection applications
• 0.1225 inch nominal measurement diameter with 0.0002 inch tolerance
• 10 microfinish surface finish for consistent, accurate contact
• Tool steel construction for durability and wear resistance in production use
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 dimensional measurement standards

Compatibility

Designed for go inspection use with set micrometers, verniers, and other precision measuring devices as specified in the product application data. Fits standard gage handle systems appropriate for light-diameter plug gages.

Installation Notes

Plug gages should be handled and stored by trained metrology or toolroom personnel to prevent damage to the precision-ground surface. Clean the gage and the workpiece bore before each measurement to remove chips, oils, or debris that can affect accuracy. Never force the gage into a hole; excessive insertion force can damage the gage or the part. Store in a protective case away from moisture and temperature extremes to preserve dimensional integrity.