Vermont Gage 111428750 Class Zz Minus Plug Pin Gage 0.2875 in

Product Description

The VERMONT GAGE 111428750 is a Class ZZ Minus plug pin gage designed for precise dimensional inspection of bores and holes. Manufactured from steel with a 10 microfinish surface coating, this pin gage measures a nominal diameter of 0.2875 inches with a tolerance of 0.0002 inches. The Class ZZ Minus designation indicates it is ground undersized, making it suited for NoGo inspection applications. Quality control technicians, machinists, and metrology professionals use this gage to verify that bore diameters do not exceed specified limits. Each unit ships with a Certificate of Accuracy that includes NIST traceability documentation.

This plug pin gage is used in manufacturing, machine shop, and quality assurance environments where precise go/nogo bore inspection is required. It is compatible with micrometer setups, vernier calipers, and other measuring device calibration workflows. With an overall length of 2 inches, it is sized for standard hand-held inspection use. Applications include incoming inspection, in-process quality checks, and final verification of machined bores in both production and toolroom settings.

Key Features

• Class ZZ Minus tolerance - ground undersized for NoGo inspection service
• 0.2875-inch nominal diameter with 0.0002-inch tolerance for tight dimensional control
• Steel construction with 10 microfinish surface for accurate, repeatable gage contact
• Overall length of 2 inches for comfortable hand-held use
• Includes Certificate of Accuracy with NIST traceability for documentation-driven quality programs
• Compatible with micrometer setting, vernier, and other precision measuring device workflows

Compatibility

Designed for use in NoGo bore inspection applications and as a setting standard for micrometers, verniers, and other precision measuring devices where a 0.2875-inch diameter reference is required.

Installation Notes

Plug pin gages are handled and used by quality technicians and machinists - no installation tools or mechanical fastening is required. Keep gage surfaces clean and lightly oiled when stored to prevent corrosion on the steel body. Do not force the gage into a bore; contact should be smooth and free of lateral pressure to avoid false readings or gage wear. Store in a protective case away from temperature extremes to maintain dimensional stability.