Vermont Gage 112307250 Class Zz Plus Plug Gage 7.25 Mm

Product Description

The VERMONT GAGE 112307250 is a Class ZZ Plus plug gage designed for go inspection of bored holes, machined bores, and precision-fit features at a nominal diameter of 7.25 mm. Manufactured from tool steel with a 10 microfinish surface coating, it holds a tolerance of 0.005 mm to confirm that a hole meets minimum size requirements before assembly or further machining. Each unit ships with a Certificate of Accuracy traceable to NIST, satisfying documentation requirements for ISO-compliant shops and calibration records. Machinists, quality technicians, and metrologists use this gage as part of a go/no-go inspection routine or to verify and set micrometers, verniers, and other measuring devices.

This plug gage is suited for precision inspection applications in manufacturing, toolroom, and quality-control environments. Its compact overall length of 2.0 inches makes it easy to handle in benchtop inspection setups. It is appropriate for use with ferrous and non-ferrous workpieces wherever a 7.25 mm nominal bore tolerance must be confirmed. Typical users include CNC machinists, QC inspectors, and metrology lab technicians working to ASME B89.1 standards.

Key Features

• Class ZZ Plus tolerance of 0.005 mm for go inspection accuracy
• Tool steel construction for durability and dimensional stability
• 10 microfinish surface coating minimizes wear and ensures repeatable contact
• Meets ASME B89.1 dimensional standard for plain plug gages
• Includes Certificate of Accuracy with NIST traceability for calibration documentation
• Compact 2.0-inch overall length suited for benchtop and in-process inspection

Compatibility

Designed as a go inspection plug gage for 7.25 mm nominal diameter bores; also used to set and verify micrometers, verniers, and other measuring devices in toolroom and quality-control applications.

Installation Notes

Plug gages are handled and used by quality technicians and machinists following standard metrology practice. Store the gage in its protective case and allow it to reach ambient temperature before use to avoid thermal expansion errors. Clean the gage and the bore with a lint-free cloth before inspection to prevent debris from affecting the reading or the gage surface. Do not force the gage into a bore; if resistance is felt beyond normal hand pressure, the feature is undersize and the gage should be withdrawn without rocking or twisting to protect the 10 microfinish surface.