Vermont Gage 112306490 Class Zz Plus Plug Gage 6.49mm

Product Description

The VERMONT GAGE 112306490 is a Class ZZ Plus plug gage with a 6.49 mm diameter, designed for dimensional inspection of machined bores and holes. Built from tool steel with a 10 microfinish surface coating, this gage delivers a tolerance of 0.00508 mm, making it suitable for go inspection applications where accurate bore verification is critical. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming conformance to ASME B89.1 standards. Machinists, quality technicians, and toolroom personnel use plug gages like this to verify that a drilled or reamed hole meets minimum size requirements before assembly or further machining operations proceed.

This plug gage is used in manufacturing and quality control environments where precise bore measurement is required. It is compatible with go inspection procedures and works alongside set micrometers, verniers, and other measuring devices for calibration and comparison checks. The 6.49 mm diameter targets holes produced by standard drill and reaming operations in light manufacturing, toolroom, and production floor settings. The overall length of 2.0 inches makes it easy to handle and compatible with standard plug gage handles or use as a standalone check piece.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm for precise go inspection
• Tool steel construction for durability and wear resistance
• 10 microfinish surface coating for consistent contact and accurate readings
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 dimensional standards
• Compatible with set micrometers, verniers, and other measuring devices

Compatibility

Designed for go inspection use with set micrometers, verniers, and other measuring devices as stated by the manufacturer. Suitable for standard plug gage handle systems accepting 6.49 mm diameter gage pins.

Installation Notes

Plug gages are handled by quality technicians and toolroom machinists and require no installation in the traditional sense. Store the gage in its protective case when not in use to prevent damage to the precision ground surface. Clean the gage and the bore thoroughly before use to avoid false readings caused by chips or coolant residue. Handle with care and avoid dropping, as impact damage can alter the ground diameter and invalidate calibration.