Vermont Gage 111138800 Class Zz Plus Plug Gage 0.388 in

Product Description

The VERMONT GAGE 111138800 is a Class ZZ Plus plug gage designed for precision dimensional inspection of bored holes, drilled passages, and machined features. It measures 0.388 inches in diameter with a tolerance of 0.0002 inches, making it suitable for Go inspection applications where tight dimensional control is required. Constructed from tool steel with a 10 microfinish surface, this gage delivers consistent, repeatable measurement performance. Each unit ships with a Certificate of Accuracy backed by NIST traceability, confirming compliance with ASME B89.1 standards. Licensed machinists, quality technicians, and calibration professionals are the primary users.

This plug gage is used in production and inspection environments where bore diameters must be verified against Go tolerance limits. Typical applications include setting micrometers, verniers, and other bench measuring devices to a known reference diameter. It is well suited for tool rooms, machine shops, and quality labs performing in-process or final inspection on parts with 0.388-inch nominal bore features. The 2.0-inch overall length provides comfortable handling during routine gage checks.

Key Features

• Class ZZ Plus tolerance class for Go inspection applications
• 0.388-inch measurement diameter with 0.0002-inch tolerance
• 10 microfinish surface for accurate, repeatable contact
• Tool steel construction for wear resistance and dimensional stability
• Includes Certificate of Accuracy with NIST traceability
• Compliant with ASME B89.1 gage standards

Compatibility

Designed for Go inspection of 0.388-inch nominal bore diameters. Also used to set and verify micrometers, verniers, and other measuring devices requiring a traceable reference standard at this diameter.

Installation Notes

Plug gages are handled and used by quality technicians and machinists in inspection settings. Clean the gage and the bore thoroughly before use to prevent debris from affecting readings or causing surface damage. Store the gage in its protective case when not in use to preserve the microfinish and dimensional integrity. Do not use excessive force when inserting the gage into a bore, as this can damage both the gage and the workpiece.