Vermont Gage 112321930 Class Zz Plus Plug Gage 21.93 Mm

Product Description

The VERMONT GAGE 112321930 is a Class ZZ Plus plug gage designed for go inspection of bored, reamed, and drilled holes with a nominal diameter of 21.93 mm. Machined from tool steel with a 10 micro finish, it holds a tolerance of 0.00508 mm, making it suitable for quality control applications where precise bore verification is required. Each unit ships with a Certificate of Accuracy that carries NIST traceability. Manufactured to ASME B89.1 standards, this gage is a working-grade instrument used in production and inspection environments by machinists, quality technicians, and metrology professionals.

This plug gage is used wherever go inspection of a 21.93 mm diameter bore is required. Typical applications include verifying hole size after drilling, reaming, or boring operations on machined parts. It is also used to set and verify micrometers, verniers, and other measuring devices to a known standard. Suitable for shop-floor use and inspection room environments in both production and job-shop settings. The included NIST-traceable certificate supports documentation requirements for ISO and AS9100 quality systems.

Key Features

• Class ZZ Plus tolerance grade at 0.00508 mm for working go inspection
• Tool steel construction provides durability under repeated handling
• 10 micro surface finish on the gage member for accurate bore contact
• Conforms to ASME B89.1 dimensional standards
• Includes Certificate of Accuracy with NIST traceability for documentation and calibration records
• Suitable for setting micrometers, verniers, and other measuring devices

Compatibility

Designed for go inspection of 21.93 mm diameter bores and for use as a reference standard with micrometers, verniers, and other measuring devices as specified in the product application data.

Installation Notes

Plug gages should be handled and stored by quality technicians or metrologists following the procedures outlined in ASME B89.1. Clean the gage and the bore with a lint-free cloth before use to prevent measurement errors caused by debris or oil film. Do not force the gage member into a bore; excessive insertion force can damage the gage or produce misleading results. Store in the provided case away from temperature extremes to maintain calibration integrity.