Vermont Gage 112121280 Class Zz Plus Plug Gage 21.28 Mm

Product Description

The VERMONT GAGE 112121280 is a Class ZZ Plus plug gage designed for precision bore and hole inspection in metrology and quality-control applications. It measures 21.28 mm in diameter with a tolerance of 0.00508 mm, making it suitable for go-inspection tasks where tight dimensional verification is required. Constructed from tool steel with a 10-micro coating finish, the gage offers durability and wear resistance under regular shop-floor use. Each unit ships with a Certificate of Accuracy traceable to NIST, supporting documentation requirements for ISO and AS9100 quality systems. Qualified inspectors and calibration technicians are the primary users of this instrument.

This plug gage is intended for go inspection of bored holes, machined bores, and precision-fit features in manufacturing and inspection environments. It is also used alongside set micrometers, verniers, and other measuring devices that require a certified reference standard for calibration or verification. The 2.0000-inch overall length provides a practical handling profile for bench and in-process inspection stations. Typical applications include aerospace, automotive, and general precision machining shops where ASME B89.1 compliance is required.

Key Features

• Class ZZ Plus tolerance grade at 0.00508 mm for high-accuracy go inspection
• Tool steel construction with 10-micro coating finish for wear and corrosion resistance
• Includes Certificate of Accuracy with NIST traceability for quality system compliance
• Meets ASME B89.1 standard for dimensional gaging
• Compatible with set micrometers, verniers, and other precision measuring devices

Compatibility

Suitable for go inspection applications and for use with set micrometers, verniers, and other measuring devices requiring a certified reference plug gage at the 21.28 mm diameter size.

Installation Notes

Plug gages are handled and used by calibration technicians and quality-control inspectors. Store the gage in its protective case when not in use to prevent surface damage. Clean the gage surface with a lint-free cloth before use to remove oils or debris that could affect measurement accuracy. Do not force the gage into an undersized bore, as this can damage the gage surface and compromise its tolerance class.