Vermont Gage 111151200 Class Zz Plus Plug Gage 0.512 in

Product Description

The VERMONT GAGE 111151200 is a Class ZZ Plus plug gage machined from tool steel and ground to a 0.512-inch nominal diameter with a tolerance of 0.0002 inches. It measures 2.0 inches in overall length and carries a 10 microfinish surface finish on the gage member. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming it meets ASME B89.1 dimensional standards. Licensed metrology technicians, machinists, and quality control inspectors use this gage to verify bore and hole diameters with high accuracy during incoming inspection or in-process measurement routines.

This plug gage is suited for go inspection of precision bored holes, drilled features, and reamed passages where tight tolerances must be confirmed before assembly. It is also used as a reference standard when setting micrometers, verniers, and other handheld measuring devices. Typical environments include machine shops, tool rooms, and quality labs handling close-tolerance work in both production and prototype settings.

Key Features

• 0.512-inch nominal diameter with 0.0002-inch Class ZZ Plus tolerance for precise go inspection
• 10 microfinish surface finish for repeatable, low-wear contact against precision bores
• Tool steel construction provides hardness and dimensional stability under repeated use
• 2.0-inch overall length offers adequate handling clearance in standard bore depths
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 standards for plain plug gages

Compatibility

Designed for go inspection of precision holes nominally sized at 0.512 inches, and suitable for use as a reference standard when calibrating or setting micrometers, verniers, and other dimensional measuring devices.

Installation Notes

Plug gages are handled and used by metrology technicians and quality inspectors — no permanent installation is required. Store the gage in its case when not in use to protect the ground surface from corrosion and mechanical damage. Apply a light coat of instrument oil before storage. Never force the gage through a bore; if it does not pass freely, the bore is undersize and requires further machining.