Vermont Gage 112112900 Class Zz Plus Plug Gage 12.9mm

Product Description

The VERMONT GAGE 112112900 is a Class ZZ Plus plug gage designed for go inspection of internal diameters at 12.9 mm. Built from tool steel with a 10 microfinish surface coating, it delivers the dimensional accuracy and surface quality required for precise bore inspection in manufacturing and metrology environments. The gage holds a tolerance of 0.00508 mm, making it suitable for applications where tight process control is essential. It ships with a Certificate of Accuracy traceable to NIST, supporting quality documentation requirements. Licensed metrologists, machinists, and quality technicians are the primary users of this tool.

This plug gage is used to verify that bored, drilled, or reamed holes meet minimum acceptable diameter specifications in a go inspection workflow. It is also used to set and verify micrometers, verniers, and other internal measuring devices. Typical applications include incoming inspection, in-process quality checks, and calibration setups across metalworking, aerospace, automotive, and general manufacturing environments. Each unit ships individually packaged with its NIST-traceable accuracy certificate included.

Key Features

• Class ZZ Plus tolerance classification for go inspection of 12.9 mm internal diameters
• 0.00508 mm tolerance for high-precision bore verification
• 10 microfinish surface coating reduces wear and ensures accurate gauge contact
• Tool steel construction for durability in production inspection environments
• Includes Certificate of Accuracy with NIST traceability for quality documentation
• Conforms to ASME B89.1 standards

Compatibility

Designed for use in go inspection applications and for setting micrometers, verniers, and other internal measuring devices requiring a 12.9 mm reference standard.

Installation Notes

Handle plug gages with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Store the gage in its protective case when not in use to preserve the surface finish and dimensional integrity. Periodic recalibration against a certified reference standard is recommended per your facility quality plan and applicable metrology standards. Do not force the gage into a bore; light, consistent hand pressure is the correct technique for go inspection.