Vermont Gage 112421090 Class Zz Minus Plug Pin Gage 21.09mm

Product Description

The VERMONT GAGE 112421090 is a Class ZZ Minus plug pin gage used to verify bore and hole diameters in precision inspection applications. It measures 21.09 mm in diameter with a tolerance of 0.00508 mm, making it suitable for NoGo inspection work where tight dimensional control is required. The gage is manufactured from steel and comes with a Certificate of Accuracy that includes NIST traceability, supporting quality assurance documentation requirements. At an overall length of 2 inches, it is compact enough for bench use and in-process inspection. Machinists, quality control technicians, and metrology professionals install and use this tool in production and inspection environments.

This pin gage is intended for NoGo inspection applications, including use with set micrometers, verniers, and other precision measuring devices. Class ZZ designates a commercial-grade tolerance class appropriate for general shop-floor and inspection room use. The Minus designation indicates the gage is ground to the lower end of the tolerance band, consistent with NoGo gage function. It is commonly found in machine shops, manufacturing facilities, and quality labs where bore acceptance criteria must be verified against a known standard.

Key Features

• 21.09 mm measurement diameter with 0.00508 mm tolerance for precise NoGo inspection
• Class ZZ Minus tolerance class ground to lower tolerance band for NoGo gage function
• Steel construction for durability in production and inspection environments
• 10 micro coating and finish for corrosion resistance and surface integrity
• Includes Certificate of Accuracy with NIST traceability for documentation compliance
• 2 inch overall length for convenient bench and in-process use

Compatibility

Designed for use in NoGo inspection applications and compatible with set micrometers, verniers, and other precision measuring devices as specified by the manufacturer.

Installation Notes

This gage is handled and used by quality control technicians and machinists in inspection settings. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain dimensional accuracy. Never force the gage into a bore; if resistance is encountered, the hole is undersize. Store separately from other tools to avoid contact damage to the gage surface.