Vermont Gage 112420590 Class Zz Minus Plug Pin Gage 20.59mm

Product Description

The VERMONT GAGE 112420590 is a Class ZZ Minus plug pin gage machined to a 20.59 mm diameter with a tolerance of 0.00508 mm. It is a single-ended, go/no-go style pin used by machinists, quality control technicians, and toolroom professionals to verify bore and hole dimensions to tight tolerances. The gage body is steel construction with a 10 micro finish coating, and it ships with a Certificate of Accuracy that carries NIST traceability. The overall length is 2 inches, keeping it compact for bench and in-process inspection work. Designed as a NoGo member, it confirms that a hole has not been cut oversized beyond allowable limits.

This plug pin gage is used in dimensional inspection applications where bore size must be verified against a specified tolerance. Typical environments include machine shops, manufacturing quality labs, and toolrooms. It works alongside set micrometers, verniers, and other measuring devices as a fast pass/fail reference check. The NoGo classification makes it the appropriate choice when confirming the maximum material condition of a hole during in-process or final inspection. It is suited for both production-floor spot checks and precise metrology bench work.

Key Features

• Class ZZ Minus tolerance grade: 0.00508 mm, suitable for general-purpose NoGo inspection
• 20.59 mm diameter steel pin with a 10 micro surface finish coating
• Overall length of 2 inches for compact, easy handling
• Includes Certificate of Accuracy with NIST traceability for documentation and audit compliance
• Compatible with set micrometers, verniers, and other dimensional measuring devices

Compatibility

Designed for use in NoGo bore inspection applications and as a reference standard for setting and verifying micrometers, verniers, and other dimensional measuring devices.

Installation Notes

Pin gages are handled and used by metrology technicians and quality control inspectors rather than installed in a mechanical system. Store the gage in its protective case when not in use to prevent nicks or corrosion that could affect accuracy. Clean the pin and the bore being checked before measurement to remove chips, oil, or debris that would introduce false readings. Apply only light hand pressure when inserting the gage; forcing a pin gage can damage both the gage and the workpiece.