Vermont Gage 112117480 Class Zz Plus Plug Gage 17.48mm

Product Description

The VERMONT GAGE 112117480 is a Class ZZ Plus cylindrical plug gage designed for precision dimensional inspection of bored or reamed holes. Built from tool steel with a 10 micro-inch surface finish, this gage checks whether a hole falls within acceptable tolerance limits for go inspection applications. The nominal diameter is 17.48 mm with a tolerance of 0.005 mm, making it suitable for tight-tolerance work where accurate hole sizing is critical. Each unit ships with a Certificate of Accuracy traceable to NIST, providing the documentation required in quality-controlled shop and lab environments. Machinists, quality technicians, and metrology professionals use this gage as a reliable, repeatable hand tool for production and inspection workflows.

This plug gage is used in go inspection routines to verify that a drilled, reamed, or bored hole meets minimum size requirements before a workpiece advances to the next production stage. It is also used to calibrate and verify the accuracy of micrometers, verniers, and other measuring devices. Typical applications include machine shops, tool rooms, and quality labs where ASME B89.1 compliance is required. The 17.48 mm diameter and Class ZZ Plus tolerance class make it appropriate for general-purpose production inspection as well as precision instrument verification.

Key Features

• Class ZZ Plus tolerance class per ASME B89.1 standard for reliable go inspection
• 17.48 mm nominal diameter with 0.005 mm tolerance for tight-tolerance hole checking
• Tool steel construction with 10 micro-inch surface finish for wear resistance and measurement consistency
• Includes Certificate of Accuracy with NIST traceability for quality documentation requirements
• Overall length of 2.0000 inches for comfortable single-hand use during inspection
• Suitable for verifying micrometers, verniers, and other precision measuring instruments

Compatibility

Designed for go inspection of holes with a nominal diameter of 17.48 mm. Also functions as a setting standard for micrometers, verniers, and other measuring devices requiring a certified reference at this diameter.

Installation Notes

Plug gages are handled and used by quality technicians and machinists; no permanent installation is required. Before use, clean the gage and the workpiece bore thoroughly to remove chips, coolant, and debris that could affect the measurement or damage the gage surface. Never force the gage into a hole — apply light, consistent hand pressure only to avoid wear or damage to the tool steel surface. Store the gage in its protective case away from temperature extremes to maintain dimensional stability and traceability.