Vermont Gage 112318930 Class Zz Plus Plug Gage 18.93mm

Product Description

The VERMONT GAGE 112318930 is a Class ZZ Plus plug gage machined from tool steel and designed for go inspection of bored, drilled, and reamed holes at a nominal diameter of 18.93 mm. The gage holds a tolerance of 0.00508 mm, meeting ASME B89.1 dimensional standards. It ships with a Certificate of Accuracy that carries NIST traceability, giving quality departments the documentation required for calibration recordkeeping. Licensed metrologists, machinists, and quality technicians rely on this type of gage to verify hole acceptance quickly and repeatably on the shop floor or in an inspection lab.

This plug gage is suited for production inspection environments where go-type verification of a 18.93 mm diameter feature is required. It is also appropriate for setting and verifying micrometers, verniers, bore gages, and other comparative measuring devices. The Class ZZ Plus designation places this gage in the working-gage tier, making it a practical choice for in-process inspection on moderate-volume machining operations in both job shop and manufacturing settings.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm per ASME B89.1 for reliable go inspection
• Tool steel construction for hardness and wear resistance in production use
• 10 micro surface finish coating for consistent contact and extended service life
• Includes Certificate of Accuracy with NIST traceability for quality documentation
• Overall length of 2.0000 inches for standard handle compatibility
• Suitable for setting micrometers, verniers, and other comparative measuring devices

Compatibility

Designed for go inspection of holes and bores at 18.93 mm nominal diameter; also compatible for use when setting micrometers, verniers, and other measuring devices requiring a traceable reference standard.

Installation Notes

Plug gages should be handled by quality technicians or machinist inspectors familiar with ASME B89.1 gage usage practices. Clean the gage and the workpiece bore thoroughly before use to prevent debris from affecting the reading or damaging the gage surface. Do not force the gage into an undersized feature; forced insertion can cause permanent damage and invalidate the gage. Store in a protective case away from temperature extremes to maintain dimensional stability and calibration integrity.