Vermont Gage 111115500 Class Zz Plus Plug Gage 0.155 in

Product Description

The VERMONT GAGE 111115500 is a Class ZZ Plus plug gage machined from tool steel for precise go-type inspection of internal bore diameters. Measuring 0.155 inches in diameter, it carries a tolerance of 0.0002 inches and a 10 microfinish surface quality rating, making it suitable for verifying whether a hole or bore meets its minimum acceptable size. A Certificate of Accuracy with NIST Traceability ships with each unit, meeting the documentation requirements of calibration-controlled shop environments. Machinists, quality technicians, and metrology lab personnel use this gage as part of a go/no-go inspection program or alongside set micrometers, verniers, and other measuring devices.

This plug gage is suited for dimensional inspection applications in manufacturing, toolroom, and quality control settings. Its 0.155-inch diameter targets small-bore work where tight tolerances demand reliable, repeatable gauging. Typical use cases include incoming inspection of machined components, in-process checking on production lines, and calibration of measuring instruments. The included NIST-traceable accuracy certificate supports ISO 9001 and other quality management documentation requirements.

Key Features

• Class ZZ Plus tolerance grade: 0.0002 inches for precise go-type bore inspection
• 10 microfinish surface treatment reduces wear on the gage and the workpiece bore
• Tool steel construction provides hardness and dimensional stability under repeated use
• Meets ASME B89.1 standards for plain plug gages
• Certificate of Accuracy with NIST Traceability included for calibration records
• 2.0-inch overall length provides a stable grip for hand-held inspection

Compatibility

Designed for go inspection of 0.155-inch nominal internal bore diameters and for setting micrometers, verniers, and other measuring devices requiring a traceable reference standard of this size.

Installation Notes

Plug gages are handled and used by quality technicians and machinists, not installed in a system. Store the gage in its protective case when not in use to prevent surface damage and corrosion. Clean the gage and the bore being inspected before use to ensure accurate readings. Never force the gage into an undersized bore, as this can damage the gage surface and invalidate calibration.