Vermont Gage 112312830 Class Zz Plus Plug Gage 12.83mm

Product Description

The VERMONT GAGE 112312830 is a Class ZZ Plus cylindrical plug gage machined from tool steel for go-type bore inspection. It measures 12.83 mm in diameter with a tolerance of 0.00508 mm and a surface finish of 10 microinch, meeting the precision demands of production and quality-control environments. The overall length is 2.0000 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming dimensional compliance at the time of manufacture. Metrology technicians, machinists, and quality inspectors use this gage to verify that bored, drilled, or reamed holes meet minimum-size acceptance criteria before assembly.

This plug gage is suited for go inspection of 12.83 mm diameter bores in production machining, tool-and-die, and precision manufacturing settings. It is also used to set and verify micrometers, verniers, and other comparative measuring devices. The Class ZZ Plus tolerance class makes it appropriate for commercial and general-purpose inspection where tighter go/no-go discrimination is required beyond standard Class ZZ limits. Typical users include QC departments, machine shops, and precision assembly facilities working to ASME B89.1 dimensional standards.

Key Features

• 12.83 mm diameter with 0.00508 mm tolerance for precise go-type bore acceptance
• Tool steel construction for hardness and wear resistance in repetitive inspection use
• 10 microinch surface finish for consistent gage-to-bore contact
• Manufactured to ASME B89.1 standards
• Includes Certificate of Accuracy with NIST traceability
• Suitable for setting micrometers, verniers, and other measuring devices in addition to go inspection

Compatibility

Designed for go inspection of 12.83 mm diameter bores and for use with micrometers, verniers, and other measuring devices requiring a traceable reference standard per ASME B89.1.

Installation Notes

Plug gages of this type are handled and used by metrology technicians and quality inspectors rather than installed in mechanical systems. Store the gage in its protective case when not in use to prevent corrosion and surface damage. Clean bore and gage surfaces before inspection to avoid false readings. Calibration intervals should follow the facility quality management plan and applicable ASME B89.1 guidance.