Vermont Gage 111177000 Class Zz Plus Plug Gage 0.77 in

Product Description

The VERMONT GAGE 111177000 is a Class ZZ Plus plug gage designed for dimensional inspection of hole and bore diameters. Machined from tool steel with a 10 microinch surface finish, it measures a nominal diameter of 0.77 inches and holds a tolerance of 0.0002 inches. The gage ships with a Certificate of Accuracy traceable to NIST, confirming compliance with ASME B89.1 standards. Quality control technicians and precision machinists use this tool to verify that bored, drilled, or reamed holes fall within specified limits before parts move to the next stage of production or assembly.

This plug gage is suited for go inspection applications in manufacturing, toolroom, and quality assurance environments. It is also used as a reference standard for setting micrometers, verniers, and other measuring devices that require a known diameter for calibration or zero-setting. The 2.0-inch overall length provides a comfortable handle for single-hand operation at the inspection bench or on the shop floor. Both production shops and metrology labs rely on Class ZZ Plus gages for reliable, repeatable diameter verification.

Key Features

• Nominal measurement diameter of 0.77 inches for precise hole inspection
• Class ZZ Plus tolerance of 0.0002 inches for consistent go-inspection performance
• 10 microinch surface finish for accurate, repeatable contact with bore surfaces
• Tool steel construction provides durability and wear resistance in shop environments
• Includes Certificate of Accuracy with NIST traceability, meeting ASME B89.1 requirements
• Suitable for setting micrometers, verniers, and other precision measuring devices

Compatibility

Designed as an OEM-style Class ZZ Plus plug gage for go inspection of 0.77-inch nominal diameter holes and bores, and for use as a reference standard with micrometers, verniers, and comparable precision measuring instruments.

Installation Notes

Plug gages are handled and used by quality control technicians and toolroom personnel. Store the gage in its protective case when not in use and apply a light coat of rust-preventive oil to prevent corrosion from handling. Do not force the gage into an undersized hole, as this can damage the gage surface and invalidate its calibration. Verify the gage certificate is current and that the instrument has not been subjected to impact or excessive wear before use in a critical inspection sequence.