Vermont Gage 112304290 Class Zz Plus Plug Gage 4.29mm

Product Description

The VERMONT GAGE 112304290 is a Class ZZ Plus plug gage used to verify bore and hole dimensions in precision inspection work. Manufactured from tool steel with a 10 microfinish surface coating, this gage measures a nominal diameter of 4.29 mm and holds a tolerance of 0.00508 mm. The overall length is 2.0000 inches. It is designed for go inspection applications and functions as a direct-use reference standard alongside micrometers, verniers, and other measuring devices. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting ASME B89.1 standards. Machinists, quality technicians, and tool room professionals rely on this gage for repeatable, traceable dimensional verification.

This plug gage is suited for use in machine shops, manufacturing quality control departments, and tool rooms where precise hole acceptance or rejection decisions are required. It is applicable in both production floor inspection and calibration lab environments. The Class ZZ Plus tolerance class makes it appropriate for general-purpose go inspection of bores at the 4.29 mm nominal size. It is also used as a reference when setting or verifying micrometers, verniers, and similar measuring instruments.

Key Features

• Class ZZ Plus tolerance class with 0.00508 mm tolerance for reliable go inspection
• Tool steel construction for durability in production and lab environments
• 10 microfinish surface coating for smooth, accurate contact with gauged surfaces
• 4.29 mm nominal diameter, 2.0000 inch overall length
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 dimensional standards

Compatibility

Designed as a go inspection plug gage for use with bores, holes, and openings at the 4.29 mm nominal diameter; also compatible for use when setting micrometers, verniers, and other measuring devices requiring a traceable reference standard.

Installation Notes

This gage is handled and used by quality technicians and machinists during inspection procedures rather than installed in a system. Keep the gage surface clean and free of chips or debris before each use to avoid false readings or surface damage. Store in a protective case away from temperature extremes to maintain dimensional stability. Handle with care to prevent drops or contact with hard surfaces that could alter the gage geometry.