Vermont Gage 111139700 Class Zz Plus Plug Gage 0.397 in

Product Description

The VERMONT GAGE 111139700 is a Class ZZ Plus plug gage designed to inspect hole diameters to a nominal size of 0.397 inches. Built from tool steel, this gage holds a tolerance of 0.0002 inches and features a 10 microfinish surface, ensuring consistent and repeatable measurement results. At 2.0 inches overall length, it is sized for practical bench and in-process use. Each unit ships with a Certificate of Accuracy with NIST traceability, supporting quality documentation requirements. Machinists, quality technicians, and inspection personnel rely on this type of gage to verify that bored, drilled, or reamed features fall within specified limits.

This plug gage is suited for go inspection applications in manufacturing and machine shop environments. It is also used to calibrate and set micrometers, verniers, and other precision measuring devices. Typical use scenarios include incoming inspection, in-process quality checks, and final part acceptance on components requiring tight hole-diameter control. The Class ZZ Plus designation indicates a tolerance grade appropriate for general-purpose inspection work where high accuracy and traceability are required.

Key Features

• Nominal diameter of 0.397 inches for precise hole inspection
• Class ZZ Plus tolerance of 0.0002 inches for reliable go/no-go verification
• 10 microfinish surface finish minimizes wear and ensures accurate contact
• Tool steel construction for durability in production and inspection environments
• Includes Certificate of Accuracy with NIST traceability for documentation and audit compliance
• Conforms to ASME B89.1 standards

Compatibility

Designed as an OEM-style Class ZZ Plus plug gage for go inspection of 0.397-inch diameter holes and for setting micrometers, verniers, and other precision measuring devices per ASME B89.1.

Installation Notes

Plug gages of this type are handled and used by quality technicians and machinists; no installation in the traditional sense applies. Before use, clean the gage and the workpiece bore to remove chips, oil, and debris that could affect measurement accuracy. Do not force the gage into an undersized hole, as this will damage the gage surface and compromise calibration. Store in a protective case away from heat sources and corrosive environments to maintain dimensional stability.