Vermont Gage 111305050 Class Zz Plus Plug Gage 0.0505 in

Product Description

The VERMONT GAGE 111305050 is a Class ZZ Plus plug gage designed for precision dimensional inspection of small-diameter bores and holes. Measuring 0.0505 inches in diameter, this gage holds a tolerance of 0.0002 inches and features a 10 microfinish surface, making it suitable for exacting go-inspection work. The overall length is 2.0 inches. Manufactured from tool steel, it delivers the hardness and wear resistance required for repeated use in production or calibration environments. A Certificate of Accuracy with NIST traceability is included, supporting documentation requirements in quality-controlled shops. It conforms to ASME B89.1 standards for plain plug gages.

This plug gage is used to verify whether a drilled, reamed, or bored hole meets its minimum acceptable diameter — the go-inspection function. Typical applications include setting and verifying micrometers, verniers, and other measuring devices, as well as inline production inspection of precision-machined components. It is appropriate for use in machine shops, tool rooms, metrology labs, and manufacturing environments where tight hole tolerances must be confirmed prior to assembly or final inspection.

Key Features

• Class ZZ Plus tolerance grade — 0.0002 inches — for high-precision go inspection
• 10 microfinish surface for consistent gage-to-bore contact and reduced wear
• Tool steel construction for durability and dimensional stability under repeated use
• Conforms to ASME B89.1 plain plug gage standards
• Includes Certificate of Accuracy with NIST traceability for quality documentation
• 2.0 inch overall length for easy handling in bench and production settings

Compatibility

Designed as a go-inspection plug gage for bores and holes nominally 0.0505 inches in diameter. Also suitable for setting and verifying micrometers, verniers, and other precision measuring devices requiring a traceable reference standard of this diameter.

Installation Notes

Plug gages of this size are handled and used by quality technicians, machinists, and metrologists — no power equipment or lockout procedures apply. Handle with clean, dry hands or cotton gloves to prevent corrosion from skin contact with the tool steel. Store in the provided case or a clean, dry environment to protect the 10 microfinish surface. Do not force the gage into an undersized hole, as damage to the gage surface will affect measurement accuracy.