Vermont Gage 112307550 Class Zz Plus Plug Gage 7.55mm

Product Description

The VERMONT GAGE 112307550 is a Class ZZ Plus cylindrical plug gage used to verify bore diameter during go inspection procedures. Machined from tool steel and finished to a 10 microfinish surface, it provides repeatable, traceable measurement results in precision inspection environments. The gage diameter is 7.55 mm with a tolerance of 0.005 mm (0.00508 mm per ASME B89.1), making it suitable for tight-tolerance hole verification. Overall length is 2.0000 inches. Each unit ships with a Certificate of Accuracy with NIST traceability, confirming conformance to national measurement standards. Licensed metrologists, quality technicians, and toolroom machinists are the primary users of this instrument.

This plug gage is intended for go inspection of 7.55 mm diameter bores in production or toolroom settings. It is also suitable for setting and checking micrometers, verniers, and other measuring devices that require a calibrated reference standard. Typical applications include incoming inspection, in-process quality control, and calibration support in manufacturing facilities handling precision-machined components.

Key Features

• Class ZZ Plus tolerance grade per ASME B89.1 for precision bore inspection
• 7.55 mm diameter with 0.005 mm tolerance for tight-tolerance go inspection
• 10 microfinish surface for consistent, low-wear contact with the workpiece
• Tool steel construction for hardness and dimensional stability
• 2.0000-inch overall length for standard handle compatibility
• Includes Certificate of Accuracy with NIST traceability

Compatibility

Designed for use as a go inspection plug gage for 7.55 mm diameter bores. Also suitable for setting micrometers, verniers, and other measuring devices requiring a calibrated cylindrical reference.

Installation Notes

Plug gages are handled and used by quality technicians and metrology professionals — no power tools or utilities need to be shut down prior to use. Store the gage in its protective case and apply a light coat of instrument oil when not in use to prevent corrosion. Do not force the gage into undersized bores, as this can damage the gage surface and affect calibration. Recalibrate periodically in accordance with your facility quality management plan and ASME B89.1 requirements.