Vermont Gage 112104780 Class Zz Plus Plug Gage 4.78 Mm

Product Description

The VERMONT GAGE 112104780 is a Class ZZ Plus plug gage machined from tool steel and finished to a 10 microfinish surface. It measures 4.78 mm in diameter with a tolerance of 0.005 mm, making it suitable for precise go inspection of bored holes, machined ports, and dimensional check points. Overall length is 2.0000 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming the gage meets ASME B89.1 standards. Machinists, quality technicians, and tool room personnel use this gage for fast, repeatable attribute inspection in production and metrology environments.

This plug gage is used in go inspection applications where a machined hole or bore must be verified against a tight dimensional tolerance. It is also appropriate for setting and verifying micrometers, verniers, and other measuring devices that require a known-diameter reference. The 4.78 mm size targets small-bore work common in precision machined components, hydraulic fittings, and instrument bodies. Suitable for both shop floor and inspection room use in light manufacturing, aerospace, and general metalworking environments.

Key Features

• 4.78 mm diameter with 0.005 mm tolerance for tight go inspection work
• 10 microfinish surface for consistent, low-wear contact with the work piece
• Tool steel construction for durability in repeated-use inspection cycles
• Complies with ASME B89.1 dimensional gage standards
• Includes Certificate of Accuracy with NIST traceability
• 2.0000 inch overall length suits standard gage handle holders

Compatibility

Designed as an OEM-style precision gage for use with standard plug gage handles and gage block accessories. Suitable for go inspection, micrometer setting, and vernier calibration applications requiring a 4.78 mm reference diameter.

Installation Notes

This gage is handled and used by quality technicians and machinists — no power tools or utilities need to be shut down prior to use. Store the gage in its case when not in use to prevent surface damage and protect the calibrated diameter. Avoid dropping or stacking with other metal tools, as impact can alter the gage diameter and invalidate NIST traceability. Re-verify certification status periodically according to your facility's gage calibration program.