Vermont Gage 112321890 Class Zz Plus Plug Gage 21.89mm

Product Description

The VERMONT GAGE 112321890 is a Class ZZ Plus plug gage designed for precise go-inspection of bored holes and machined features at a nominal diameter of 21.89 mm. Manufactured from tool steel with a 10 micro-inch surface finish, it holds a tolerance of 0.00508 mm, delivering the accuracy required for verifying part conformance on the shop floor or in a quality lab. Each unit ships with a Certificate of Accuracy traceable to NIST, supporting documentation requirements in ISO and AS9100 quality systems. Dimensional inspection technicians, machinists, and quality control personnel are the primary users of this gage.

This plug gage is suited for go inspection applications across light manufacturing, precision machining, and quality assurance environments. It is used with micrometers, verniers, and other measuring devices to verify that bored or reamed holes meet dimensional tolerances. The gage conforms to ASME B89.1 standards, making it appropriate for both in-process checks on CNC machining centers and final inspection stations. It is applicable in residential toolroom settings and commercial production-line quality control programs wherever 21.89 mm hole tolerances must be confirmed.

Key Features

• Class ZZ Plus tolerance rating of 0.00508 mm for high-accuracy go inspection
• Tool steel construction with 10 micro-inch surface finish for durability and wear resistance
• Includes Certificate of Accuracy with NIST traceability for quality system compliance
• Conforms to ASME B89.1 dimensional gage standards
• Compatible with micrometers, verniers, and standard measuring device setups
• Overall length of 2.0000 inches for consistent handling and fixturing

Compatibility

Designed for go inspection use with micrometers, verniers, and other measuring devices as stated by the manufacturer. Suitable as a Class ZZ Plus plug gage for any application requiring ASME B89.1 compliant inspection of 21.89 mm diameter holes.

Installation Notes

Plug gages are handled and used by quality technicians and precision machinists following established dimensional inspection procedures. Before use, clean the gage and the workpiece bore thoroughly to prevent debris from affecting readings or causing surface damage. Store the gage in its protective case when not in use to preserve the ground surface finish and dimensional integrity. Handle with care to avoid drops or impacts that could alter the calibrated diameter.