Vermont Gage 112220220 Class Zz Minus Plug Pin Gage 20.22mm

Product Description

The VERMONT GAGE 112220220 is a Class ZZ Minus plug pin gage designed for precise dimensional inspection of bored holes, machined bores, and other critical features requiring NoGo verification. Built from steel with a 10 micro-inch finish, this pin gage measures a nominal diameter of 20.22 mm with a tolerance of 0.00508 mm, making it suitable for high-accuracy gauging work. It ships with a Certificate of Accuracy that includes NIST traceability, supporting calibration documentation requirements in quality-controlled environments. Machinists, quality technicians, and tool-room professionals use this gage for go/no-go inspection routines and as a reference standard when setting micrometers, verniers, and other measuring devices.

This pin gage is used in manufacturing, machining, and inspection settings where bore diameter verification is required. The Class ZZ designation indicates a commercial-grade tolerance class suited for NoGo inspection applications, reference setting, and general shop-floor measurement. It is appropriate for use with a wide range of measuring instruments including micrometers and vernier calipers. The 2-inch overall length provides adequate handling clearance in most inspection fixtures and hand-held use cases.

Key Features

• 20.22 mm nominal measurement diameter with 0.00508 mm tolerance for precise bore inspection
• Class ZZ Minus designation for NoGo inspection and measuring device calibration
• Steel construction with 10 micro-inch surface finish for consistent contact and wear resistance
• Includes Certificate of Accuracy with NIST traceability for documentation and calibration records
• 2-inch overall length suitable for hand-held use and standard inspection fixtures
• Lightweight at 0.29 pounds for comfortable extended use during inspection routines

Compatibility

Designed for use in NoGo inspection applications and as a reference standard when setting micrometers, verniers, and other precision measuring devices. Suitable for general shop-floor and quality lab use where a Class ZZ plug pin gage at 20.22 mm is required.

Installation Notes

Pin gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion and contamination of the gage surface. Store the gage in its protective case when not in use and allow it to temperature-stabilize alongside the workpiece before taking measurements to avoid thermal expansion errors. Periodic cleaning and recalibration against NIST-traceable standards is recommended to maintain measurement integrity over time.