Vermont Gage 111191000 Class Zz Plus Plug Gage 0.91 in

Product Description

The VERMONT GAGE 111191000 is a Class ZZ Plus plug gage designed to verify bore and hole diameters with precision tolerances. Manufactured from tool steel with a 10 microfinish surface, this gage holds a diameter of 0.91 inches and a tolerance of 0.0002 inches, making it suitable for high-accuracy Go inspection work. The overall length is 2.0 inches. It ships with a Certificate of Accuracy with NIST Traceability, satisfying documentation requirements in quality-controlled environments. Dimensional inspection technicians, machinists, and metrology professionals use this gage for fast, repeatable pass/fail checks on workpiece bores and precision-ground holes.

This plug gage is applied in Go inspection tasks where confirming that a hole or bore meets minimum size requirements is critical. It is also suited for setting and calibrating micrometers, verniers, and other measuring devices to a known reference diameter. Typical use environments include machine shops, manufacturing quality-control stations, and metrology labs where ASME B89.1 compliance is required. The Class ZZ Plus classification designates it for use with commercial-grade tooling inspection, offering tighter control than standard Class ZZ specifications.

Key Features

• 0.91 inch measurement diameter with 0.0002 inch tolerance for precise Go inspection
• Tool steel construction for durability and dimensional stability under repeated use
• 10 microfinish surface reduces wear and ensures consistent contact measurement
• Includes Certificate of Accuracy with NIST Traceability for documented calibration compliance
• Meets ASME B89.1 dimensional standards
• Suitable for setting micrometers, verniers, and comparable measuring instruments

Compatibility

Designed for Go inspection of bores and holes at 0.91 inch nominal diameter. Also used to set and verify micrometers, verniers, and other measuring devices requiring a traceable reference standard at this diameter.

Installation Notes

This gage is handled and used by inspection technicians and machinists in metrology applications. Clean the gage and the workpiece bore before use to prevent contamination from affecting measurement accuracy. Store the gage in its protective case when not in use to preserve the surface finish and dimensional integrity. Do not force the gage into an undersized bore, as this can damage both the gage and the workpiece.