Vermont Gage 112304730 Class Zz Plus Plug Gage 4.73mm

Product Description

The VERMONT GAGE 112304730 is a Class ZZ Plus cylindrical plug gage designed to verify bore diameters to a high degree of accuracy. Built from tool steel with a 10 microfinish surface coating, this gage measures a nominal diameter of 4.73 mm with a tolerance of 0.00508 mm. The overall length is 2.0000 inches. It is used in quality control and inspection environments where precise dimensional verification of holes, bores, and internal features is required. Machinists, quality technicians, and metrologists rely on this type of instrument for Go inspection applications in manufacturing and calibration settings.

This plug gage is suited for Go inspection use, confirming that a bored or reamed feature meets minimum acceptance criteria. It is also compatible with setting micrometers, verniers, and other measuring devices requiring a certified reference standard. The 4.73 mm diameter makes it applicable to small-bore inspection tasks in precision machining, toolroom environments, and production floor quality checks. Each unit ships with a Certificate of Accuracy traceable to NIST, supporting documentation requirements for ISO and AS9100 quality systems.

Key Features

• Class ZZ Plus tolerance classification with 0.00508 mm tolerance for precise Go inspection
• Tool steel construction for wear resistance and dimensional stability
• 10 microfinish surface coating for smooth, repeatable gage contact
• Conforms to ASME B89.1 standards
• Includes Certificate of Accuracy with NIST traceability
• Compatible with micrometers, verniers, and other measuring devices as a setting reference

Compatibility

Designed for Go inspection use and for setting micrometers, verniers, and other measuring devices requiring a certified dimensional reference at 4.73 mm nominal diameter.

Installation Notes

Plug gages are handled and used by quality technicians and metrologists; no power source or fastener installation is required. Store the gage in its protective case and handle with clean, dry hands or lint-free gloves to prevent corrosion and dimensional error from thermal transfer. Do not force the gage into a bore; apply light, consistent hand pressure only. Periodically verify the gage against its calibration certificate and re-certify per your facility quality schedule.