Vermont Gage 111131700 Class Zz Plus Plug Gage 0.317 in

Product Description

The VERMONT GAGE 111131700 is a Class ZZ Plus plug gage machined from tool steel for go inspection of bores, holes, and internal diameters. It measures 0.317 inches in diameter with a tolerance of 0.0002 inches and a surface finish of 10 microfinish. Each unit ships with a Certificate of Accuracy bearing NIST traceability, meeting ASME B89.1 standards. At 2.0 inches overall length, it is sized for easy single-hand use in production and inspection environments. Machinists, quality control technicians, and toolroom personnel rely on this type of gage for fast, repeatable attribute inspection.

This plug gage is suited for go inspection tasks in manufacturing, toolroom, and metrology applications. It is used to verify that bores and internal features meet minimum size requirements before assembly or further machining. Typical users include machinists performing in-process checks, QC inspectors on receiving or final inspection, and calibration technicians setting micrometers, verniers, and other measuring devices to a known reference diameter.

Key Features

• Class ZZ Plus tolerance grade: 0.0002 inches, suitable for general-purpose go inspection
• 10 microfinish surface for consistent, low-wear contact with the gauged bore
• Tool steel construction for durability in production environments
• Meets ASME B89.1 dimensional standards
• Includes Certificate of Accuracy with NIST traceability for calibration records
• 2.0 inches overall length for convenient single-hand operation

Compatibility

Designed for go inspection of 0.317-inch diameter bores and as a reference standard for setting micrometers, verniers, and other measuring devices requiring a traceable gage pin at this diameter.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians — no permanent installation is required. Before use, clean the gage and the bore with a lint-free cloth to remove chips, oil, or debris that could cause a false reading or accelerate wear. Store the gage in its case when not in use to protect the lapped surface and maintain calibration integrity. Do not force the gage into a bore; if resistance is felt, the feature is undersize and further machining or inspection is needed.