Vermont Gage 112220560 Class Zz Minus Plug Gage 20.56mm

Product Description

The VERMONT GAGE 112220560 is a Class ZZ minus plug pin gage machined for NoGo inspection work. It measures 20.56 mm in diameter with a tolerance of 0.00508 mm, making it suitable for verifying that a bored or reamed hole does not exceed its maximum allowable size. The steel construction holds up to repetitive use in shop and inspection environments. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming the gage meets documented dimensional standards. Overall length is 2 inches. This gage is used by quality control inspectors, machinists, and toolroom technicians who require reliable go/nogo verification on close-tolerance work.

This plug pin gage is intended for NoGo inspection applications where confirming the upper limit of a hole diameter is critical. It is also suited for setting micrometers, verniers, and other comparative measuring devices to a known reference diameter. Typical use is in machine shops, manufacturing cells, and quality labs working with metric hole tolerances in the 20 mm range. The 10 micro-inch coating and finish provides a consistent, wear-resistant contact surface for accurate readings over extended service.

Key Features

• Class ZZ minus tolerance classification for NoGo inspection use
• 20.56 mm measurement diameter with 0.00508 mm tolerance
• Steel construction for durability in shop environments
• 10 micro-inch coating and finish for consistent contact surface
• Certificate of Accuracy included with full NIST traceability
• 2-inch overall length for standard plug gage handling

Compatibility

Designed for NoGo inspection of metric bored or reamed holes near 20.56 mm diameter, and compatible with setting micrometers, verniers, and other comparative measuring instruments requiring a traceable reference standard.

Installation Notes

Plug pin gages are handled and used by quality control inspectors and precision machinists and do not require power or mechanical installation. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the steel surface. Do not force the gage into a hole; a NoGo gage should not enter a correctly sized bore. Store in the provided case or a padded holder to protect the finished surface from contact damage.