Vermont Gage 112318830 Class Zz Plus Plug Gage 18.83mm

Product Description

The VERMONT GAGE 112318830 is a Class ZZ Plus plug gage designed for dimensional inspection of bores and holes with an 18.83 mm nominal diameter. Manufactured from tool steel with a 10 micro-inch surface finish, it holds a tolerance of 0.00508 mm, making it suitable for go inspection work and calibration verification of micrometers, verniers, and other precision measuring devices. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming traceability to national measurement standards. This gage is handled by metrology technicians, quality control inspectors, and machinists working in production or calibration environments.

This plug gage is used in manufacturing and metrology settings where bore diameter verification is required to ASME B89.1 standards. Typical applications include go inspection of machined bores, qualification of measuring instruments such as micrometers and vernier calipers, and incoming or in-process quality checks. The 2.0000-inch overall length provides adequate handling clearance for bench use. It is suited to both shop-floor and lab environments where repeatable, traceable measurement is required.

Key Features

• Class ZZ Plus tolerance grade — 0.00508 mm tolerance for precision go inspection
• Tool steel construction for wear resistance and dimensional stability
• 10 micro-inch surface finish for consistent gage contact
• Meets ASME B89.1 dimensional gage standards
• Includes Certificate of Accuracy with NIST traceability
• Compact 2.0000-inch overall length for bench and handheld use

Compatibility

Designed as an OEM-style replacement and standard inspection tool for go plug gage applications requiring an 18.83 mm nominal diameter, compatible with standard gage handle sets used in precision metrology and machining inspection setups.

Installation Notes

Plug gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Store the gage in its protective case when not in use and allow it to thermally stabilize to the measurement environment before use. Do not force the gage into a bore — apply only light, consistent hand pressure consistent with go inspection technique. Periodic cleaning and recalibration against NIST-traceable standards is recommended per your facility quality plan.