Vermont Gage 112302550 Class Zz Plus Plug Gage 2.55 Mm

Product Description

The VERMONT GAGE 112302550 is a Class ZZ Plus plug gage machined from tool steel for precise dimensional inspection of small bores and holes. Designed for go inspection applications, it checks that a feature falls within its minimum acceptable size limit. The gage diameter is 2.55 mm with a tolerance of 0.00508 mm, and the working surface carries a 10 microfinish rating for consistent, repeatable contact. Overall length is 2.0000 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting the documentation requirements of quality management systems in production and inspection environments. Machinists, quality technicians, and tool-room personnel are the primary users.

This plug gage is suited for go inspection of precision bores in manufacturing, metrology labs, and machine shops. It is also used to set and verify micrometers, verniers, and other measuring devices that require a traceable reference standard. At 2.55 mm diameter, it covers small-bore work common in precision machined components, medical device manufacturing, and close-tolerance tooling. Conformance is certified to ASME B89.1, the governing standard for dimensional gaging in the United States.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm for high-accuracy go inspection
• Tool steel construction for wear resistance and dimensional stability
• 10 microfinish surface on the gaging member for repeatable contact
• Certificate of Accuracy included with NIST traceability
• Meets ASME B89.1 dimensional gaging standard
• 2.0000-inch overall length for standard handle compatibility

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for go inspection setups requiring a 2.55 mm diameter member; also compatible for use as a setting standard with micrometers, verniers, and other calibrated measuring devices per ASME B89.1.

Installation Notes

Plug gages of this type are handled and used by quality technicians and machinists following standard metrology practices. Clean the gaging surface and the bore being checked before use to prevent false readings or surface damage. Never force the gage through an undersized feature; light hand pressure is the correct technique for go inspection. Store in a protective case away from temperature extremes to maintain calibration integrity.