Vermont Gage 112102780 Class Zz Plus Plug Gage 2.78mm

Product Description

The VERMONT GAGE 112102780 is a Class ZZ Plus cylindrical plug gage designed for precise go-inspection of bored, drilled, and reamed holes. Machined from tool steel, this gage checks a nominal diameter of 2.78 mm and holds a tolerance of 0.00508 mm. The working surface is finished to a 10 microinch microfinish, ensuring consistent, repeatable contact with the gauged surface. Every unit ships with a Certificate of Accuracy traceable to NIST. Dimensional inspection technicians and quality control personnel use this gage in production and incoming-inspection environments to verify that hole diameters meet specification before assembly or further machining proceeds.

This plug gage is suited for go-inspection applications where tight-tolerance hole verification is required. It is compatible with use alongside set micrometers, verniers, and other precision measuring devices, making it a practical addition to an inspection station or toolroom. The 2.78 mm diameter and 2.0000-inch overall length make it appropriate for small-bore inspection in precision machined components. Typical users include quality inspectors, machinists, and tool-room technicians working in manufacturing, aerospace, automotive, and general metalworking environments.

Key Features

• Class ZZ Plus tolerance rating: 0.00508 mm for high-precision go-inspection
• 10 microinch microfinish on the gaging surface for repeatable contact accuracy
• Tool steel construction provides hardness and wear resistance for production use
• Compliant with ASME B89.1 dimensional gage standards
• Includes Certificate of Accuracy with NIST traceability
• 2.0000-inch overall length suits small-bore and close-quarters inspection setups

Compatibility

Designed for go-inspection use and compatible with set micrometers, verniers, and other precision measuring devices per the manufacturer application data. No specific machine or system model compatibility was provided in the product data.

Installation Notes

Plug gages are handled and applied by quality control technicians and inspection personnel, not installed in a mechanical system. Clean the gage and the bore being checked before use to prevent false readings from debris or coolant residue. Do not force the gage through a hole; excessive insertion force can damage the gage surface and invalidate the measurement. Store the gage in its protective case and re-certify on a calibration schedule appropriate to your quality system requirements.