Vermont Gage 111151100 Class Zz Plus Plug Gage 0.511 in

Product Description

The VERMONT GAGE 111151100 is a Class ZZ Plus plug gage designed to measure bore and hole diameters to a nominal 0.511 inches. Built from tool steel, it holds a tolerance of 0.0002 inches and carries a 10 microfinish surface finish on the gaging member. Each unit ships with a Certificate of Accuracy traceable to NIST, making it suitable for calibration-controlled environments. Machinists, quality control inspectors, and metrology technicians use this gage to verify dimensional conformance in production and inspection settings. It conforms to ASME B89.1 standards for plain plug gages.

This plug gage is used for Go inspection of holes and bores in manufacturing and quality assurance applications. It is compatible with inspection workflows that include setting micrometers, verniers, and other measuring devices. The 0.511-inch diameter makes it appropriate for medium-bore inspection tasks in both job-shop and production-floor environments. The overall length of 2.0 inches provides comfortable handling for bench or in-process inspection work.

Key Features

• Class ZZ Plus tolerance of 0.0002 inches for precise Go inspection
• 10 microfinish surface on gaging surfaces for accurate, repeatable contact
• Tool steel construction for wear resistance in production use
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 plain plug gage standards
• Nominal diameter of 0.511 inches with 2.0-inch overall length

Compatibility

Designed for Go inspection of 0.511-inch nominal diameter holes and bores, and for setting micrometers, verniers, and other measuring devices where a traceable Class ZZ Plus reference standard is required.

Installation Notes

Plug gages are handled and used by quality control inspectors and machinists trained in dimensional metrology. Store the gage in its protective case when not in use to prevent surface damage and corrosion. Clean the gaging surfaces with a lint-free cloth before each use and apply a light coat of instrument oil for long-term storage. Do not force the gage into an undersize hole, as this can damage the gaging member and invalidate calibration.