Vermont Gage 112221060 Class Zz Minus Plug Pin Gage 21.06mm

Product Description

The VERMONT GAGE 112221060 is a Class ZZ Minus plug pin gage machined from steel and used to verify bore diameters in precision inspection applications. At 21.06 mm in diameter with a tolerance of 0.00508 mm, this gage provides the close-tolerance accuracy required for NoGo inspection routines. The overall length is 2 inches. Each unit ships with a Certificate of Accuracy that includes NIST traceability, confirming the gage has been verified against a national measurement standard. This is a working-class gage suited for quality control environments where repeatable, documented dimensional verification is required.

This pin gage is used in dimensional inspection of machined bores, holes, and features where a NoGo check is part of the acceptance process. It is also appropriate for setting and verifying micrometers, verniers, and other measuring devices to a known reference diameter. Typical users include machinists, metrology technicians, and quality control inspectors in manufacturing, aerospace, and general industrial environments where tight dimensional tolerances are maintained and documented.

Key Features

• Class ZZ Minus tolerance designation for NoGo inspection use
• 21.06 mm measurement diameter with 0.00508 mm tolerance
• Steel construction for durability and dimensional stability
• 10 micro-inch coating and finish for surface consistency
• Includes Certificate of Accuracy with NIST traceability
• Overall length of 2 inches for standard handle compatibility

Compatibility

Designed for use in NoGo bore inspection routines and as a reference standard for setting micrometers, verniers, and other precision measuring devices requiring a 21.06 mm reference diameter.

Installation Notes

Pin gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion and dimensional contamination from skin oils. Store the gage in its case when not in use and allow it to reach ambient temperature before use if brought in from a significantly different environment. Do not force the gage into a bore; proper NoGo gaging relies on the gage failing to pass through an in-tolerance feature without applied pressure. Periodic recalibration against a traceable standard is recommended per your facility's quality management procedures.