Vermont Gage 112305250 Class Zz Plus Plug Gage 5.25mm

Product Description

The VERMONT GAGE 112305250 is a Class ZZ Plus plug gage designed for precision go inspection of bored holes, machined bores, and other critical diameter features. Built from tool steel with a 10 microfinish surface, this gage measures a nominal diameter of 5.25 millimeters and holds a tolerance of 0.005 mm (0.00508 mm actual). Overall length is 2.0000 inches. It ships with a Certificate of Accuracy backed by NIST traceability, making it suitable for documented quality systems. Machinists, quality technicians, and metrology professionals install this type of gage as part of go/no-go inspection routines.

This plug gage is used in dimensional inspection of tight-tolerance bores in manufacturing and machine shop environments. It is appropriate for both production-floor go inspection and bench-level calibration reference tasks alongside set micrometers, vernier calipers, and other precision measuring devices. The Class ZZ Plus tolerance class positions it as a high-accuracy working gage suitable for close-tolerance applications. Typical users include quality control departments, tool rooms, and precision machining operations requiring documented traceability to national standards.

Key Features

• 5.25 mm nominal diameter with 0.005 mm tolerance for tight-bore inspection
• Class ZZ Plus tolerance class for high-accuracy go inspection applications
• 10 microfinish surface for consistent gage-to-bore contact
• Tool steel construction for wear resistance and dimensional stability
• Includes Certificate of Accuracy with NIST traceability for documented quality systems
• Conforms to ASME B89.1 standard

Compatibility

Designed as an OEM-style working plug gage for go inspection of 5.25 mm diameter bores; also suitable for setting and verifying micrometers, verniers, and other precision measuring devices requiring a Class ZZ Plus reference.

Installation Notes

Plug gages of this type are handled and deployed by quality technicians and machinists - no power source or lockout procedure is required. Always clean the gage and the bore with a lint-free cloth before use to prevent false readings caused by debris or oil film. Do not force the gage into the bore; apply only light hand pressure consistent with go inspection practice. Store in a protected case away from temperature extremes to maintain dimensional integrity and surface finish.