Vermont Gage 111198900 Class Zz Plus Plug Gage 0.989 in

Product Description

The VERMONT GAGE 111198900 is a Class ZZ Plus plug gage designed for precision dimensional inspection of bored and reamed holes. Machined from tool steel, this go-style gage checks that a hole falls within the acceptable lower tolerance boundary of its specified diameter. At a nominal diameter of 0.989 inches with a tolerance of 0.0002 inches, it delivers the accuracy required for production floor and quality-control applications. Each unit ships with a Certificate of Accuracy traceable to NIST standards, meeting ASME B89.1 requirements. Machinists, toolroom technicians, and quality inspectors use this type of gage as a fast, reliable pass-fail check in high-volume inspection workflows.

This plug gage is suited for go inspection of precision holes in manufacturing, toolroom, and metrology environments. It is also used to calibrate and verify the accuracy of micrometers, verniers, and other handheld measuring devices. The 0.989-inch diameter range covers typical shaft-fit and bore-tolerance applications found in light industrial and precision machining settings. Its compact overall length of 2.0 inches makes it easy to handle in benchtop or in-process inspection setups.

Key Features

• Class ZZ Plus tolerance rating at 0.0002 inches for reliable go-inspection accuracy
• Tool steel construction for hardness and wear resistance under repeated use
• 10 micro finish coating for consistent contact surface quality
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 dimensional gage standards
• Compact 2.0-inch overall length for easy benchtop and in-process handling

Compatibility

Designed as a go plug gage for inspecting holes at a nominal diameter of 0.989 inches. Suitable for use with micrometers, verniers, and other measuring devices requiring a calibration reference at this diameter.

Installation Notes

Plug gages are handled and used by quality technicians and machinists; no permanent installation is required. Clean the gage and the bore being inspected before use to prevent debris from affecting readings or causing surface damage. Store the gage in its protective case when not in use to prevent corrosion and surface wear. Periodic recalibration against a NIST-traceable reference is recommended to maintain measurement integrity over time.