Vermont Gage 112303150 Class Zz Plus Plug Gage 3.15 Mm

Product Description

The VERMONT GAGE 112303150 is a Class ZZ Plus plug gage machined from tool steel and designed for precise bore inspection in metrology and quality-control environments. It measures 3.15 mm in diameter with a tolerance of 0.00508 mm and a 10 microfinish surface. The overall length is 2.0000 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, making it suitable for documented inspection programs. Machinists, quality technicians, and metrologists use this gage to verify hole diameters, calibrate set micrometers, verniers, and other measuring devices to a known standard.

This plug gage is intended for go inspection applications in manufacturing, toolroom, and metrology lab settings. It functions as a reference standard when setting and verifying micrometers, verniers, bore gages, and similar instruments. The Class ZZ Plus designation indicates a tighter-tolerance gage suitable for inspection-grade work rather than general workshop use. It is appropriate for both production floor spot checks and calibration bench applications where NIST-traceable documentation is required.

Key Features

• 3.15 mm diameter with 0.00508 mm tolerance for precise bore verification
• 10 microfinish surface for accurate, repeatable contact measurement
• Tool steel construction for hardness and dimensional stability
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 standards
• Overall length of 2.0000 inches for standard handle compatibility

Compatibility

Designed for use as a go inspection gage and as a reference standard for setting micrometers, verniers, and other measuring devices. Suitable for any application requiring a Class ZZ Plus plug gage at 3.15 mm diameter per ASME B89.1.

Installation Notes

Plug gages are handled and used by quality technicians and metrologists. Keep the gage clean and lightly oiled when not in use to prevent corrosion. Never force the gage into a bore; apply only hand pressure to avoid damaging the gage or the workpiece. Store in the supplied case or a protected tray away from abrasive materials to preserve the 10 microfinish surface.