Vermont Gage 112121420 Class Zz Plus Plug Gage 21.42mm

Product Description

The VERMONT GAGE 112121420 is a Class ZZ Plus cylindrical plug gage used to verify bore diameters in precision inspection and quality-control applications. The gage measures 21.42 mm in diameter with a tolerance of 0.005 mm (0.00508 mm actual), making it suitable for go-inspection work where tight dimensional verification is required. Constructed from tool steel with a 10 micro finish, it delivers consistent, repeatable results across production and inspection environments. A Certificate of Accuracy with NIST traceability is included, supporting documentation requirements in calibrated measurement programs. Overall length is 2.0000 inches. Machinists, quality technicians, and metrologists are the primary users of this instrument.

This plug gage is designed for go-inspection tasks in manufacturing and metrology settings. It is compatible with use alongside micrometers, verniers, and other precision measuring devices for setting and verification purposes. Typical applications include checking machined bores, validating tooling setups, and confirming dimensional compliance on production parts. The included NIST-traceable certificate makes it appropriate for use in ISO-compliant or audited quality systems. Suitable for both job-shop and production-floor inspection environments.

Key Features

• Class ZZ Plus tolerance rating for go-inspection dimensional verification
• 21.42 mm diameter with 0.005 mm tolerance for precise bore checking
• Tool steel construction with 10 micro finish for durability and measurement consistency
• Meets ASME B89.1 standards for gage dimensional accuracy
• Includes Certificate of Accuracy with NIST traceability for calibration documentation
• Overall length of 2.0000 inches for standard plug gage handle compatibility

Compatibility

Designed for use with go-inspection setups and compatible with micrometers, verniers, and other precision measuring devices per the manufacturer application data. No specific equipment model compatibility is listed in the available product data.

Installation Notes

This gage is handled and used by quality technicians and metrologists; no power-down or mechanical installation is required. Store the gage in a protective case away from temperature extremes to maintain dimensional stability and surface finish integrity. Clean contact surfaces before each use to prevent measurement error caused by debris or contamination. Handle with care to avoid drops or impacts that could alter the precision ground surfaces.