Vermont Gage 112306470 Class Zz Plus Plug Gage 6.47mm

Product Description

The VERMONT GAGE 112306470 is a Class ZZ Plus plug gage designed for precision hole inspection in tool rooms, quality labs, and production floor environments. It checks a 6.47 mm diameter bore to verify conformance to dimensional tolerances. The gage is manufactured from tool steel and carries a 10 microfinish surface on the gaging member, which directly affects measurement repeatability and wear life. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting the documentation requirements of most quality management systems. Dimensional tolerance is held to 0.00508 mm, consistent with ASME B89.1 standards. Machinists, quality technicians, and tool room inspectors are the primary users of this type of gage.

This plug gage is suited for go inspection applications where a 6.47 mm hole must be verified for minimum acceptable size before a part proceeds in production. It is also used as a setting standard for micrometers, verniers, and other comparative measuring devices that require a known reference. The overall length of 2.0 inches makes it compatible with standard-length gage handle sets used in both job shop and production inspection settings. Typical applications include incoming inspection, in-process quality checks, and final inspection of drilled, reamed, or bored holes.

Key Features

• 6.47 mm gaging diameter held to 0.00508 mm tolerance per ASME B89.1
• Class ZZ Plus designation for go inspection of production bores
• 10 microfinish surface for consistent contact and extended gage life
• Tool steel construction for durability in shop environments
• Includes Certificate of Accuracy with NIST traceability
• 2.0 inch overall length fits standard gage handles

Compatibility

Designed for use as a go plug gage in standard gage handle sets and as a setting reference for micrometers, verniers, and other measuring devices requiring a 6.47 mm diameter reference standard.

Installation Notes

Plug gages are handled and used by quality technicians and tool room personnel following metrology best practices. Store the gage in its protective case when not in use to prevent surface damage to the gaging member. Clean the bore and gage surface before use to avoid false readings caused by debris or coolant residue. Do not force the gage into an undersized hole, as this will damage the finish and invalidate calibration.