Vermont Gage 112312910 Class Zz Plus Plug Gage 12.91mm

Product Description

The VERMONT GAGE 112312910 is a Class ZZ Plus plug gage designed for go inspection of bored, drilled, and reamed holes with a nominal diameter of 12.91 mm. Manufactured from tool steel with a 10 micro finish coating, this gage provides a tolerance of 0.00508 mm, meeting ASME B89.1 standards for dimensional gaging accuracy. Each unit ships with a Certificate of Accuracy traceable to NIST, making it suitable for quality control environments where traceability documentation is required. Machinists, quality technicians, and metrology professionals use this gage to verify hole diameter conformance on production and inspection floors.

This plug gage is used in go inspection applications where a machined hole must meet minimum diameter requirements before a part moves to the next stage of production. It is also used alongside set micrometers, verniers, and other measuring devices for calibration and comparison work. The 2.0 inch overall length provides a comfortable handle grip for repeated use in bench inspection or in-process checking environments. Typical industries include precision machining, tool and die, aerospace component fabrication, and general manufacturing quality assurance.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm meets ASME B89.1 dimensional gaging standards
• Tool steel construction with 10 micro finish coating for wear resistance and surface consistency
• Includes Certificate of Accuracy with NIST traceability for documented quality control programs
• 12.91 mm nominal diameter for go inspection of machined holes
• 2.0 inch overall length for easy single-hand operation during bench or floor inspection
• Compatible with set micrometers, verniers, and other comparative measuring devices

Compatibility

Designed for go inspection use with set micrometers, verniers, and other measuring devices as stated by the manufacturer. Suitable for any application requiring a Class ZZ Plus plug gage at a 12.91 mm nominal diameter per ASME B89.1.

Installation Notes

Plug gages are handled and used by quality technicians and machinists — no permanent installation is required. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the tool steel surface. Do not force the gage into an undersized hole, as this can damage the gage surface and compromise dimensional accuracy. Store in a protective case away from temperature extremes to maintain calibration integrity between uses.