Vermont Gage 112303450 Class Zz Plus Plug Gage 3.45mm

Product Description

The VERMONT GAGE 112303450 is a Class ZZ Plus plug gage machined from tool steel for precision bore inspection in metrology and quality control applications. The gage measures 3.45 mm in diameter with a tolerance of 0.00508 mm, making it suitable for tight-tolerance go inspection work. The working surface carries a 10 microfinish, which supports accurate contact with the bore surface and reduces measurement error. Overall length is 2.0000 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting documentation requirements for ISO and AS9100 quality systems. Licensed metrology technicians, toolroom machinists, and quality inspectors are the primary users of this gage.

This plug gage is used to verify whether a drilled, reamed, or bored hole falls within its tolerance range as part of a go inspection routine. It is also compatible with setup and calibration workflows for set micrometers, verniers, and other precision measuring devices. Typical applications include incoming inspection, in-process quality checks, and final verification on machined components across aerospace, automotive, medical device, and general manufacturing environments. The compact size and tool steel construction make it practical for both bench use and shop-floor deployment.

Key Features

• Class ZZ Plus tolerance grade with 0.00508 mm tolerance for precision go inspection
• 3.45 mm diameter tool steel construction for wear resistance and dimensional stability
• 10 microfinish working surface for accurate, repeatable bore contact
• Overall length of 2.0000 inches for easy handling in standard gage holders
• Meets ASME B89.1 standard for plain plug gages
• Includes Certificate of Accuracy with NIST traceability for quality system documentation

Compatibility

Designed as an OEM-style replacement and standard inspection gage for use with set micrometers, verniers, and other calibrated measuring devices requiring a Class ZZ Plus plug gage reference at 3.45 mm diameter.

Installation Notes

Plug gages of this type are handled and used by metrology technicians and quality inspectors rather than installed in a mechanical system. Store the gage in its protective case when not in use to prevent damage to the precision-ground surface. Clean the gage surface with a lint-free cloth and appropriate instrument-grade solvent before each use. Do not force the gage into a bore; if resistance is encountered, remove the gage and inspect the bore for burrs or contamination before proceeding.