Vermont Gage 911118800 Class Zz Plus Plug Gage 0.188 in

Product Description

The VERMONT GAGE 911118800 is a Class ZZ Plus plug gage designed to measure bore and hole diameters to a tolerance of 0.0002 inches. Manufactured from tool steel with a black oxide finish, this gage provides corrosion resistance and reduced glare during inspection work. It measures a nominal diameter of 0.188 inches and has an overall length of 2.0 inches. Each unit ships with a Certificate of Accuracy with NIST traceability, confirming it meets ASME B89.1 standards. Machinists, quality control technicians, and metrology professionals use this gage as part of go inspection routines on production and job-shop floors.

This plug gage is suited for go inspection applications where precise bore acceptance or rejection decisions must be made quickly and reliably. It is also used to set and verify micrometers, verniers, and other measuring devices. The 0.188 inch diameter makes it appropriate for small-bore work common in precision machining, tooling fabrication, and quality assurance operations in both light manufacturing and heavy industrial environments. Its compact 2.0 inch overall length allows use in tight workpiece geometries.

Key Features

• Class ZZ Plus tolerance of 0.0002 inches for precise go inspection
• Tool steel construction for durability and dimensional stability
• Black oxide finish resists corrosion and minimizes surface glare
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 standards
• Compact 2.0 inch overall length for use in confined bore geometries

Compatibility

Designed for go inspection of 0.188 inch nominal diameter bores and for use in setting micrometers, verniers, and other precision measuring devices per ASME B89.1.

Installation Notes

Plug gages are handled and applied by machinists and quality control technicians — no power tools or utilities need to be shut down prior to use. Handle the gage with clean, dry hands or lint-free gloves to prevent oils from affecting measurement accuracy. Store in the provided case or a padded holder to protect the lapped surfaces from nicks and burrs. Periodically verify the gage against its NIST-traceable certificate to confirm it remains within calibration.