Vermont Gage 112103400 Class Zz Plus Plug Gage 3.4 Mm

Product Description

The VERMONT GAGE 112103400 is a Class ZZ Plus plug gage designed for precise dimensional inspection of small-diameter bores and holes. Built from tool steel with a 10 microfinish surface, this gage measures 3.4 mm in diameter with a tolerance of 0.00508 mm, making it appropriate for high-accuracy go inspection tasks. It has an overall length of 2.0 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming conformance to ASME B89.1 standards. Metrology technicians, machinists, and quality control inspectors use this tool to verify that a drilled, reamed, or machined bore is within acceptable dimensional limits.

This plug gage is used in manufacturing and inspection environments where tight bore tolerances must be verified quickly and reliably. Typical applications include go inspection of precision-machined components, as well as setting and verifying micrometers, verniers, and other measuring devices. It is suited for both production-floor spot checks and laboratory-grade inspection workflows where ASME B89.1 compliance is required.

Key Features

• Class ZZ Plus tolerance grade with 0.00508 mm tolerance for high-accuracy go inspection
• 3.4 mm diameter tool steel construction for durability and dimensional stability
• 10 microfinish surface finish minimizes measurement error and wear on precision bores
• Includes Certificate of Accuracy with NIST traceability, conforming to ASME B89.1
• Compact 2.0-inch overall length suits tight-access inspection scenarios
• Suitable for setting micrometers, verniers, and other calibrated measuring devices

Compatibility

Designed for go inspection of bores and holes at 3.4 mm diameter. Also used to set and verify micrometers, verniers, and other precision measuring devices where a known reference diameter is required.

Installation Notes

Plug gages are handled and used by metrology technicians, machinists, and QC inspectors — no power tools or utilities need to be shut down before use. 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; excessive insertion force can damage both the gage and the workpiece. Store in a protective case away from temperature extremes to preserve dimensional accuracy.