Vermont Gage 111328850 Class Zz Plus Plug Gage 0.2885 in

Product Description

The VERMONT GAGE 111328850 is a Class ZZ Plus plug gage designed for precision dimensional inspection of bored, drilled, and reamed holes. Manufactured from tool steel with a 10 microfinish surface, this gage measures hole diameters to a nominal 0.2885 inches with a tolerance of 0.0002 inches. At 2.0 inches overall length, it fits standard gage handle holders used in production and quality-control environments. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting the documentation requirements of most shop-floor and metrology-lab inspection programs. Licensed metrologists, QC inspectors, and machining professionals rely on this class of gage for high-repeatability go inspection work.

This plug gage is suited for go inspection of precision holes in manufacturing, tool-and-die, and machine-shop settings. It is also used as a reference standard for setting micrometers, verniers, and other measuring devices requiring a known physical reference. Class ZZ Plus gages are common in both production-line attribute inspection and general-purpose dimensional verification where ASME B89.1 compliance is required or specified by a quality plan.

Key Features

• 0.2885 inches nominal diameter with 0.0002 inches tolerance for precise hole inspection
• Tool steel construction for wear resistance in repetitive inspection use
• 10 microfinish surface for consistent, low-friction gage entry
• 2.0 inches overall length compatible with standard plug gage handles
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 dimensional gage standards

Compatibility

Designed for use as a go inspection gage and as a reference standard for setting micrometers, verniers, and other measuring devices. Fits standard plug gage handles sized for this diameter class.

Installation Notes

Plug gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Before use, confirm the gage is at ambient temperature to avoid thermal expansion error, particularly in climate-controlled metrology environments. Do not force the gage through an undersized hole; forced insertion will damage the gage surface and invalidate calibration. Store in the original case or a protected tray when not in use to maintain the 10 microfinish surface condition.