Vermont Gage 112104500 Class Zz Plus Plug Gage 4.5 Mm

Product Description

The VERMONT GAGE 112104500 is a Class ZZ Plus cylindrical plug gage designed for go inspection of bored, drilled, and reamed holes with a nominal diameter of 4.5 mm. Manufactured from tool steel with a 10 microfinish surface, this gage delivers a tolerance of 0.00508 mm, meeting the dimensional verification requirements of ASME B89.1. Each unit ships with a Certificate of Accuracy backed by NIST traceability, making it suitable for use in calibrated inspection environments. The overall length is 2.0 inches. Machinists, quality technicians, and tool room personnel use this gage to confirm hole size acceptance before parts advance through a production or assembly process.

This plug gage is applied in go inspection routines where a hole must accept the gage to be considered within the lower tolerance boundary. Typical use cases include incoming inspection, in-process quality checks on machined components, and calibration verification of micrometers, verniers, and other measuring devices. The 4.5 mm diameter targets small-bore work common in precision machining, instrument manufacturing, and general metalworking operations. Its compact size makes it well suited for benchtop inspection stations and portable quality kits.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm for precise go inspection at 4.5 mm nominal diameter
• Tool steel construction for wear resistance and dimensional stability
• 10 microfinish surface finish minimizes measurement error from surface irregularities
• Conforms to ASME B89.1 dimensional gage standards
• Includes Certificate of Accuracy with NIST traceability for calibration records
• Usable as a reference standard for setting micrometers, verniers, and bore measuring devices

Compatibility

Designed as an OEM-style go plug gage for 4.5 mm nominal diameter hole inspection applications conforming to ASME B89.1 standards.

Installation Notes

Plug gages are handled and used by quality technicians and tool room personnel, not installed in a mechanical system. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the tool steel surface. Never force the gage into a hole; go inspection requires the gage to enter under its own weight or with light hand pressure only. Store in a protective case away from temperature extremes to maintain dimensional accuracy between calibration intervals.