Vermont Gage 112307990 Class Zz Plus Plug Gage 7.99mm

Product Description

The VERMONT GAGE 112307990 is a Class ZZ Plus cylindrical plug gage machined from tool steel and designed for precision bore inspection. It measures 7.99 mm in diameter with a tolerance of 0.00508 mm and a surface finish of 10 microfinish, making it suitable for verifiable, repeatable Go inspection work. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming conformance to ASME B89.1 standards. Machinists, toolroom technicians, and quality control inspectors use this gage to verify that drilled, reamed, or bored holes fall within specified limits before parts advance through production.

This plug gage is used in manufacturing and inspection environments where tight dimensional control is required. It is appropriate for Go inspection of 7.99 mm bores in metal, plastic, or composite workpieces. Beyond bore checking, it can serve as a setting standard for micrometers, verniers, and other measuring devices that require a known reference diameter. The overall length of 2.0000 inches allows comfortable single-hand use and compatibility with standard gage handle sets. It is well suited for job shops, production lines, and quality labs handling small-diameter precision work.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm for high-precision Go inspection
• 7.99 mm diameter with 10 microfinish surface for consistent, repeatable gaging
• Tool steel construction for wear resistance and long service life
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 dimensional standards
• Overall length of 2.0000 inches fits standard plug gage handles

Compatibility

Designed for use as a Go inspection gage for 7.99 mm diameter bores and as a setting reference for micrometers, verniers, and other measuring devices. Compatible with standard plug gage handles sized for the 7.99 mm diameter range.

Installation Notes

Plug gages should be handled by metrology or quality control personnel following standard gage care procedures. Store the gage in its protective case when not in use to prevent surface damage or corrosion. Clean the gage and the bore being checked before use to avoid false readings caused by chips or debris. Do not force the gage into a bore — if resistance is felt beyond normal light hand pressure, re-check the workpiece dimension before proceeding.