Vermont Gage 111142800 Class Zz Plus Plug Gage 0.428 in

Product Description

The VERMONT GAGE 111142800 is a Class ZZ Plus plug gage designed to perform go inspection on machined bores and holes with a nominal diameter of 0.428 inches. Manufactured from tool steel and finished to a 10 microfinish surface, this gage delivers the dimensional accuracy required for shop-floor and quality-lab verification work. The overall length of 2.0 inches provides a practical working reach for most bench and inline inspection setups. Tolerance is held to 0.0002 inches, meeting ASME B89.1 standards. Each unit ships with a Certificate of Accuracy traceable to NIST, supporting documented quality programs and AS9100 or ISO inspection requirements. Machinists, quality technicians, and tool-room staff rely on this type of gage for fast, repeatable go-no-go hole verification.

This plug gage is suited for inspecting drilled, reamed, or bored holes in production and job-shop environments. Typical applications include verifying bore size conformance on machined components before assembly. The 111142800 is also referenced as a setup standard for calibrating and setting micrometers, verniers, and other measuring devices where a traceable reference of 0.428 inches is needed. It is appropriate for both light manufacturing and precision inspection environments where Class ZZ Plus tolerance control is specified.

Key Features

• Class ZZ Plus tolerance rating — 0.0002 inches — for precise go inspection of 0.428-inch diameter bores
• Tool steel construction provides hardness and wear resistance suited to repetitive shop use
• 10 microfinish surface finish reduces gage wear and promotes accurate, consistent seating in the bore
• Meets ASME B89.1 dimensional standard for plug gages
• Includes Certificate of Accuracy with NIST traceability for use in documented quality systems
• Overall length of 2.0 inches suits standard hand-held inspection technique

Compatibility

Designed for go inspection of machined holes and bores at 0.428 inches nominal diameter, and for use as a setting standard with micrometers, verniers, and other measuring devices requiring a traceable reference at this diameter.

Installation Notes

Plug gages are handled and used by quality technicians and machinists — no power tools or utilities need to be shut down before use. Keep the gage clean and lightly oiled when stored to prevent corrosion of the tool steel. Never force a plug gage into an undersized bore; excessive force can damage both the gage and the workpiece. Verify gage condition and re-certify on a schedule consistent with your quality management system requirements.