Vermont Gage 112107280 Class Zz Plus Plug Gage 7.28mm

Product Description

The VERMONT GAGE 112107280 is a Class ZZ Plus cylindrical plug gage machined from tool steel and finished to a 10 microfinish surface quality. It measures 7.28 mm in diameter and is used to verify that a drilled, reamed, or bored hole meets minimum acceptable size for a go inspection. Overall length is 2.0000 inches. Tolerance is held to 0.00508 mm, meeting the precision requirements of ASME B89.1. Each unit ships with a Certificate of Accuracy traceable to NIST. Machinists, quality control technicians, and precision metrology professionals use this gage as part of standard dimensional verification workflows.

This plug gage is suited for go inspection tasks in production and inspection environments where hole diameter conformance must be verified quickly and repeatably. It is also referenced when setting micrometers, verniers, and other measuring devices that require a known, certified dimensional standard. Typical applications include incoming inspection, in-process quality checks, and calibration support in machine shops, manufacturing facilities, and metrology labs working to close tolerances in the 7 mm range.

Key Features

• Class ZZ Plus tolerance held to 0.00508 mm per ASME B89.1
• 10 microfinish surface for consistent, repeatable gage contact
• Tool steel construction for wear resistance in production environments
• Includes Certificate of Accuracy with NIST traceability
• Suitable for go inspection, micrometer setting, and vernier calibration

Compatibility

Designed for use as a go plug gage in dimensional inspection applications involving 7.28 mm nominal hole diameters, and as a setting standard for micrometers, verniers, and other precision measuring devices.

Installation Notes

Plug gages are handled and used by quality control technicians and precision machinists following standard metrology practices. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the tool steel surface. Do not force the gage into an undersized hole, as this will damage both the gage and the workpiece. Store in the provided case or protective sleeve to maintain surface finish integrity.