Vermont Gage 112303970 Class Zz Plus Plug Gage 3.97mm

Product Description

The VERMONT GAGE 112303970 is a Class ZZ Plus plug gage designed for precision bore inspection in metrology and quality control applications. Built from tool steel with a 10 microfinish surface coating, this gage provides a diameter of 3.97 mm and holds a tolerance of 0.00508 mm, making it suitable for go inspection tasks that demand repeatable, traceable measurement. Each unit ships with a Certificate of Accuracy with NIST Traceability, confirming conformance to ASME B89.1 standards. The overall length is 2.0000 inches. Machinists, quality technicians, and calibration professionals are the primary users.

This plug gage is used in production and inspection environments where small-bore dimensional verification is required. Typical applications include go inspection of drilled or reamed holes, setting micrometers, and verifying verniers and other measuring devices. It is well suited for both shop-floor and laboratory metrology settings where ASME B89.1 compliance is required. The compact size and consistent finish make it practical for high-frequency use in tight-tolerance manufacturing operations.

Key Features

• Class ZZ Plus tolerance class for go inspection applications
• 3.97 mm diameter with 0.00508 mm tolerance for precise bore verification
• 10 microfinish surface coating for consistent, low-wear contact
• Tool steel construction for durability in production environments
• Includes Certificate of Accuracy with NIST Traceability
• Conforms to ASME B89.1 dimensional gage standards

Compatibility

Designed for go inspection of bores at 3.97 mm nominal diameter and for setting micrometers, verniers, and other measuring devices requiring a traceable reference standard.

Installation Notes

Plug gages are handled and applied by quality technicians and calibration professionals; no power tools or electrical shutoff procedures are required. 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 a bore; apply only light, even hand pressure during inspection to avoid damaging the gage or the workpiece. Store in the provided case or a clean, dry location to maintain surface finish and traceability integrity.