Vermont Gage 112108400 Class Zz Plus Plug Gage 8.4 Mm

Product Description

The VERMONT GAGE 112108400 is a Class ZZ Plus plug gage designed for go inspection of internal bores and holes with a nominal diameter of 8.4 mm. Manufactured from tool steel, this gage delivers a 10 microfinish surface and holds a tolerance of 0.00508 mm, making it suitable for precision dimensional verification in production and quality-control environments. Each unit ships with a Certificate of Accuracy traceable to NIST, supporting documentation requirements in calibrated inspection programs. Machinists, quality technicians, and tool room personnel rely on this type of gage to confirm that a drilled, reamed, or bored feature meets minimum size requirements before parts advance to the next operation.

This plug gage is used in go inspection applications where confirming minimum hole size is critical. It is well suited for setting and verifying micrometers, verniers, and other measuring devices to a known reference diameter. Typical use cases include incoming inspection, in-process gauging on machined components, and calibration of measuring instruments in tool rooms and quality labs. The overall length of 2.0000 inches provides adequate handling clearance for most standard workpiece setups. Conforms to ASME B89.1 dimensional standards for gage blanks and tolerancing.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm for precise go inspection
• 8.4 mm nominal diameter, 2.0000 inch overall length
• 10 microfinish surface for consistent, repeatable gaging contact
• Tool steel construction for wear resistance and dimensional stability
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 standards

Compatibility

Designed as an OEM-style go plug gage for use with standard gage handle systems accepting 8.4 mm diameter gage blanks per ASME B89.1. Also suitable for use as a reference setting master for micrometers, verniers, and comparable measuring instruments.

Installation Notes

Plug gages should be handled and stored carefully to prevent surface damage or contamination that could affect dimensional accuracy. Clean both the gage and the part bore before inspection, and apply a light gage oil if repeated cycling is required to reduce wear. Do not force the gage into an undersized feature. Periodic recalibration against traceable standards is recommended to confirm gage integrity over time.