Vermont Gage 112121140 Class Zz Plus Plug Gage 21.14mm

Product Description

The VERMONT GAGE 112121140 is a Class ZZ Plus plug gage precision-ground to a nominal diameter of 21.14 mm with a tolerance of 0.005 mm (0.00508 mm per ASME B89.1). Machined from tool steel and finished to a 10 micro surface finish, this gage is built for repeatable go inspection of bored holes, drilled passages, and machined features. A Certificate of Accuracy with NIST traceability ships with each unit, making it ready for use in calibrated measurement environments without additional third-party certification steps. Metrology technicians, quality control inspectors, and precision machinists rely on plug gages of this class for confirming dimensional compliance on production and toolroom workpieces.

The 112121140 is suited for go inspection applications in manufacturing, toolroom, and quality assurance environments. At 21.14 mm diameter and an overall length of 2.0000 inches, the gage integrates with standard handle systems used in dimensional inspection workflows. It is also compatible with setting and verifying micrometers, verniers, and other comparative measuring devices where a traceable reference standard is required. Typical users include machinists, quality technicians, and calibration lab personnel working to ASME dimensional standards.

Key Features

• Class ZZ Plus tolerance of 0.005 mm per ASME B89.1 for go inspection applications
• Tool steel construction for wear resistance and dimensional stability
• 10 micro surface finish for consistent seating and low gage wear on mating bores
• Includes Certificate of Accuracy with NIST traceability
• Compatible with micrometers, verniers, and other precision measuring devices as a reference standard
• Overall length of 2.0000 inches fits standard plug gage handle systems

Compatibility

Designed for go inspection of features at 21.14 mm nominal diameter. Also suitable for setting micrometers, verniers, and other measuring devices requiring a traceable dimensional reference. Fits standard plug gage handles accepting this diameter class.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion and contamination of the gaging surface. Before use, verify the gage and workpiece are at the same ambient temperature to avoid thermal expansion errors. Store the gage in its case when not in use and apply a light coat of instrument oil for long-term storage. Inspection and calibration of this gage should follow ASME B89.1 procedures and your facility quality management system.