Vermont Gage 112312810 Class Zz Plus Plug Gage 12.81mm

Product Description

The VERMONT GAGE 112312810 is a Class ZZ Plus plug gage designed for dimensional inspection of bored holes and machined features at a 12.81 mm nominal diameter. Built from tool steel with a 10 micro finish, it delivers a tolerance of 0.005 mm, making it appropriate for go-inspection workflows where consistent, repeatable measurement is required. Each unit ships with a Certificate of Accuracy traceable to NIST, giving quality technicians and machinists documented proof of conformance at the time of calibration. The overall length is 2.0 inches, keeping it manageable for bench and floor inspection tasks.

This plug gage is used in manufacturing, machine shop, and quality-control environments where hole diameter must be verified against a nominal specification. It is suited for go inspection of through-holes and blind bores in metal and engineered plastic components. The gage is also used as a reference standard when setting micrometers, verniers, and other comparative measuring devices. Typical users include machinists, quality inspectors, and metrology technicians working to ASME B89.1 standards in both job-shop and production environments.

Key Features

• Class ZZ Plus tolerance of 0.005 mm for go-inspection applications
• 12.81 mm nominal diameter, 2.0-inch overall length
• Tool steel construction with 10 micro surface finish
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 dimensional gage standards
• Compatible as a setting reference for micrometers, verniers, and other measuring devices

Compatibility

Designed for go inspection of 12.81 mm diameter features and for use as a setting reference with micrometers, verniers, and other measuring devices, per the application data provided by the manufacturer.

Installation Notes

Plug gages are handled and used by trained machinists or quality inspectors and do not require installation in the traditional sense. Store the gage in its protective case when not in use and avoid contact with abrasive surfaces to preserve the 10 micro finish. Clean the gage and the part bore before use to prevent debris from introducing measurement error. Periodic recalibration against a certified standard is recommended to maintain traceability per ASME B89.1.