Vermont Gage 111162100 Class Zz Plus Plug Gage 0.621 in

Product Description

The VERMONT GAGE 111162100 is a Class ZZ Plus plug gage designed for precise go inspection of bored, drilled, and reamed holes. It measures a nominal diameter of 0.621 inches with a tolerance of 0.0002 inches, conforming to ASME B89.1 standards. The gage body is machined from tool steel and features a 10 microinch surface finish for consistent, repeatable contact. Each unit ships with a Certificate of Accuracy that includes NIST traceability, making it suitable for use in calibrated inspection environments. Machinists, quality technicians, and tool room personnel rely on this type of gage for fast, definitive pass/fail hole checks.

This plug gage is used in machine shops, production floors, and quality labs where hole diameter must be verified against a defined tolerance. It is well suited for checking holes produced by drilling, boring, or reaming operations. The 0.621-inch diameter and 2.0-inch overall length make it practical for a wide range of workpiece thicknesses. It is also commonly used to set and verify micrometers, verniers, and other comparative measuring devices during calibration routines.

Key Features

• Class ZZ Plus tolerance: 0.0002 inches for high-accuracy go inspection
• 10 microinch surface finish for consistent gage contact and wear resistance
• Tool steel construction for durability in production and lab environments
• Conforms to ASME B89.1 dimensional gage standards
• Includes Certificate of Accuracy with NIST traceability
• 2.0-inch overall length suits a broad range of workpiece configurations

Compatibility

Designed for go inspection of 0.621-inch nominal diameter holes and for use as a reference standard when setting micrometers, verniers, and other precision measuring devices.

Installation Notes

Plug gages are handled and used by quality technicians and machinists trained in precision measurement. Before use, clean both the gage and the workpiece bore with a lint-free cloth to remove chips, coolant, and debris that could affect readings. Do not force the gage into the hole; excessive insertion force can damage the gage land or the workpiece. Store the gage in its protective case and apply a light coat of rust-preventive oil when not in use to maintain surface integrity and NIST-traceable accuracy.