Vermont Gage 111199000 Class Zz Plus Plug Gage 0.99 in

Product Description

The VERMONT GAGE 111199000 is a Class ZZ Plus plug gage machined from tool steel and designed for dimensional go inspection of bored, reamed, or drilled holes. It checks whether a hole meets minimum acceptable size by passing through the feature at the specified diameter of 0.99 inches. The gage holds a tolerance of 0.0002 inches and delivers a 10 microinch surface finish, supporting accurate, repeatable measurement in shop or inspection environments. Calibration technicians, machinists, and quality inspectors use this type of gage as a fast, reliable attribute inspection tool.

This plug gage is suited for go inspection work in machine shops, tool rooms, and quality control stations handling precision-machined components. It is also used to set and verify micrometers, verniers, and other measuring devices where a traceable reference of known diameter is required. The 0.99-inch diameter makes it applicable to medium-bore inspection tasks common in general manufacturing and precision machining. Each unit ships with a Certificate of Accuracy backed by NIST traceability, making it suitable for documented inspection programs and ISO-compliant quality systems.

Key Features

• Class ZZ Plus tolerance of 0.0002 inches for precise go inspection
• 10 microinch surface finish for consistent, repeatable contact
• Tool steel construction for wear resistance and dimensional stability
• Includes Certificate of Accuracy with NIST traceability
• Compliant with ASME B89.1 standards
• Suitable for setting micrometers, verniers, and other measuring devices

Compatibility

Designed for go inspection of holes and bores at 0.99 inches nominal diameter; also used as a reference standard for setting micrometers, verniers, and comparable hand measuring instruments.

Installation Notes

Plug gages are handled and used by calibration technicians, machinists, and quality inspectors — not installed in the conventional sense. Store the gage in its protective case when not in use and keep it free of burrs, chips, and contaminants that can affect accuracy. Do not force the gage through a feature; a go gage should pass under its own weight or with light hand pressure only. Clean and lightly oil tool steel gages after use to prevent corrosion.