Vermont Gage 111199800 Class Zz Plus Plug Gage 0.998in

Product Description

The VERMONT GAGE 111199800 is a Class ZZ Plus plug gage designed for precise go inspection of bored, drilled, and reamed holes. Machined from tool steel, this gage measures a nominal diameter of 0.998 inches with a tolerance of 0.0002 inches and a surface finish of 10 microinch. It ships with a Certificate of Accuracy traceable to NIST, confirming it meets ASME B89.1 standards. Metrology technicians, tool room machinists, and quality control inspectors rely on plug gages like this one to verify that machined features fall within acceptable dimensional limits quickly and repeatably.

This gage is suited for go inspection tasks in manufacturing, tool rooms, and inspection labs. It is commonly used alongside set micrometers, verniers, and other precision measuring devices to confirm bore sizes during production or incoming inspection. Its overall length of 2.0 inches makes it easy to handle during bench inspection. Typical applications include checking bores in metal components where tight dimensional control is required. No power source or calibration equipment is needed at the point of use beyond keeping the gage clean and at a stable temperature.

Key Features

• Class ZZ Plus tolerance grade: 0.0002 inches for high-accuracy go inspection
• Tool steel construction for durability and wear resistance in production environments
• 10 microinch surface finish for consistent, repeatable contact with bore surfaces
• Includes Certificate of Accuracy with NIST traceability per ASME B89.1
• Compact 2.0-inch overall length for easy one-handed bench use

Compatibility

Designed for go inspection of holes at a nominal diameter of 0.998 inches. Compatible with standard plug gage handles and suitable for use with set micrometers, verniers, and other precision measuring devices as stated by the manufacturer.

Installation Notes

Plug gages are handled and used by metrology technicians and quality control inspectors — no power source or mechanical installation is required. Before use, clean the gage and the bore with a lint-free cloth to remove chips, coolant, and debris that could cause false readings or surface damage. Allow the gage and workpiece to reach the same ambient temperature, ideally 68 degrees F (20 degrees C), before taking measurements to minimize thermal expansion error. Store the gage in its case when not in use to protect the lapped surface finish.