Vermont Gage 111177700 Class Zz Plus Plug Gage 0.777 in

Product Description

The VERMONT GAGE 111177700 is a Class ZZ Plus plug gage used to verify bore and hole dimensions to a high degree of accuracy. Machined from tool steel and finished to a 10 micro-inch surface finish, this gage measures a nominal diameter of 0.777 inches with a tolerance of 0.0002 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, making it suitable for quality-control environments where documented traceability is required. Licensed inspectors, machinists, and metrology technicians use this gage type to confirm dimensional conformance on production and inspection lines.

This plug gage is designed for go inspection applications where a precise 0.777-inch diameter reference is needed. It is also used to set and verify micrometers, verniers, bore gages, and other measuring devices in shop-floor or laboratory inspection settings. The overall length of 2.0 inches makes it easy to handle in standard inspection fixtures. Typical use cases include incoming inspection, in-process quality checks, and calibration of measuring instruments in both production and job-shop environments.

Key Features

• Class ZZ Plus tolerance rating with a 0.0002-inch tolerance for precise dimensional verification
• Nominal measurement diameter of 0.777 inches for targeted bore and hole inspection
• Tool steel construction with a 10 micro-inch surface finish for durability and wear resistance
• Includes a Certificate of Accuracy with full NIST traceability
• Conforms to ASME B89.1 standards for gage design and dimensional accuracy
• Suitable for setting micrometers, verniers, and other precision measuring instruments

Compatibility

Designed as an OEM-style go plug gage for use in standard inspection fixtures and gage blocks conforming to ASME B89.1; compatible with micrometers, verniers, bore gages, and other measuring devices that require a 0.777-inch reference standard.

Installation Notes

Plug gages are handled and used by machinists, quality technicians, and metrologists — no installation in the traditional sense applies. Store the gage in its protective case when not in use to prevent damage to the precision-ground surface. Clean the gage and the bore or instrument contact surface before use to avoid measurement error from debris or oils. Do not force the gage into an undersized bore, as this can damage the ground surface and compromise calibration integrity.