Vermont Gage 112318770 Class Zz Plus Plug Gage 18.77mm

Product Description

The VERMONT GAGE 112318770 is a Class ZZ Plus cylindrical plug gage used to inspect hole diameters during manufacturing and quality control operations. Machined from tool steel with a 10 micro finish, this plug gage measures a nominal diameter of 18.77 mm and holds a tolerance of 0.005 mm, making it suitable for Go inspection applications where close dimensional verification is required. Overall length is 2.0000 inches. Each unit ships with a Certificate of Accuracy that includes NIST traceability, supporting documented quality systems. Metrology technicians, machinists, and quality control inspectors use this gage as a direct reference standard or alongside micrometers, verniers, and other precision measuring devices.

This plug gage is intended for Go inspection service in production and inspection environments where 18.77 mm bore verification is required. It is also suitable for setting and calibrating micrometers, verniers, and comparable measuring instruments. Typical applications include incoming inspection, in-process machining verification, and final part acceptance. The gage conforms to ASME B89.1 standards, making it appropriate for use in regulated or certified inspection processes at both job-shop and production-floor levels.

Key Features

• Class ZZ Plus tolerance grade with 0.005 mm tolerance for close-tolerance hole inspection
• Tool steel construction with 10 micro surface finish for durability and wear resistance
• Conforms to ASME B89.1 dimensional standards
• Includes Certificate of Accuracy with NIST traceability for calibration documentation
• Suitable for Go inspection and as a reference standard for setting precision measuring instruments
• Overall length of 2.0000 inches for standard handle compatibility

Compatibility

Designed for Go inspection of 18.77 mm diameter bores and for use with micrometers, verniers, and other precision measuring devices as stated by the manufacturer. Conforms to ASME B89.1.

Installation Notes

Plug gages of this type are handled and used by trained metrology technicians or quality control personnel, not installed in a mechanical system. Store the gage in a protective case when not in use to prevent surface damage. Clean contact surfaces before each use to prevent measurement error caused by debris or oils. Avoid dropping or striking the gage, as impact can alter the ground surface and invalidate NIST-traceable certification.