Vermont Gage 112104420 Class Zz Plus Plug Gage 4.42mm

Product Description

The VERMONT GAGE 112104420 is a Class ZZ Plus plug gage machined from tool steel and used to verify bore diameters in precision inspection work. It measures 4.42 mm in diameter with a tolerance of 0.00508 mm, making it suitable for go-inspection applications where tight dimensional control is required. The gage carries a 10 microfinish surface rating, which reduces measurement error caused by surface contact variation. Overall length is 2.0000 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, supporting documentation requirements in calibrated inspection environments. Licensed metrologists, quality technicians, and precision machinists are the primary users.

This plug gage is used in incoming inspection, in-process quality control, and final inspection of machined bores at the 4.42 mm nominal diameter. It is appropriate for setting and verifying micrometers, verniers, and other measuring devices where a physical reference standard is needed. The Class ZZ Plus designation indicates a commercial-grade tolerance range suitable for general inspection use in job shop, production floor, and metrology lab settings, both in light manufacturing and precision machining operations.

Key Features

• 4.42 mm nominal diameter with 0.00508 mm tolerance for precise go-inspection
• Tool steel construction for wear resistance and dimensional stability
• 10 microfinish surface for consistent contact and accurate readings
• NIST-traceable Certificate of Accuracy included with each unit
• Meets ASME B89.1 standards for plain gage dimensional requirements
• Compact 2.0000-inch overall length for easy handling in tight inspection setups

Compatibility

Designed as an OEM-style Class ZZ Plus plug gage for go-inspection of 4.42 mm nominal bores, and suitable for use as a setting reference with micrometers, verniers, and comparable measuring devices.

Installation Notes

Plug gages of this type are handled by quality technicians and metrology personnel rather than installed in a mechanical system. Before use, clean the gage and the bore being inspected to remove debris, oil, or chips that could affect readings. Do not force the gage into an undersized bore, as this can damage the gage surface and invalidate calibration. Store in a protective case away from temperature extremes to maintain dimensional stability and NIST traceability validity.