Vermont Gage 112307970 Class Zz Plus Plug Gage 7.97mm

Product Description

The VERMONT GAGE 112307970 is a Class ZZ Plus plug gage designed for precision bore inspection in machine shops, quality control labs, and production environments. Built from tool steel with a 10 microfinish surface, this gage provides a reliable go-inspection reference for holes near the 7.97 mm nominal diameter. The 0.005 mm (0.00508 mm actual) tolerance class makes it suitable for moderate-precision fits where repeatable, traceable measurement is required. Each unit ships with a Certificate of Accuracy that carries NIST traceability, supporting documented quality programs and audit requirements. Licensed metrologists, machinists, and quality technicians routinely use this type of gage as part of a calibrated inspection routine.

This plug gage is used in go-inspection applications to verify that a bored, drilled, or reamed hole meets minimum size requirements before assembly. It also serves as a setting standard for micrometers, verniers, and other variable measuring devices that need a physical reference at or near 7.97 mm. Typical environments include precision machining, toolroom inspection, and incoming material verification. The compact overall length of 2.0000 inches allows use in shallow or restricted bore depths. Both production floor inspectors and metrology lab staff will find this gage appropriate for daily use.

Key Features

• Class ZZ Plus tolerance of 0.005 mm supports moderate-precision go inspection
• Tool steel construction provides wear resistance for repetitive inspection cycles
• 10 microfinish surface finish ensures consistent, low-drag contact in the bore
• Includes Certificate of Accuracy with NIST traceability for documented QC programs
• Conforms to ASME B89.1 standards for plain plug gages
• Overall length of 2.0000 inches suits shallow bore applications

Compatibility

Designed for go-inspection of holes with a 7.97 mm nominal diameter and for use as a setting reference with micrometers, verniers, and other measuring devices requiring a traceable physical standard at this diameter.

Installation Notes

Plug gages are handled and deployed by machinists, quality technicians, and metrologists — no power source or mechanical installation is required. Store the gage in its protective case when not in use and avoid contact with abrasive surfaces that could alter the finish. Clean the gage and the bore being inspected before use to prevent debris from affecting the reading or damaging the gage surface. Periodic recalibration against a traceable standard is recommended to maintain measurement integrity in accordance with your quality management system requirements.