Vermont Gage 111431050 Class Zz Minus Plug Pin Gage 0.3105 in

Product Description

The VERMONT GAGE 111431050 is a Class ZZ Minus plug pin gage designed for NoGo inspection of bores and holes with a nominal diameter of 0.3105 inches. Machined from steel with a 10 microfinish surface, it delivers the close-tolerance accuracy required for dimensional inspection work. With a tolerance of 0.0002 inches, this gage meets Class ZZ specifications and ships with a Certificate of Accuracy traceable to NIST. Overall length is 2 inches, making it well suited for benchtop or handheld inspection tasks performed by machinists, quality control technicians, and precision measurement professionals.

This plug pin gage is used to verify that a hole or bore has not been machined undersized, functioning as the NoGo member in a go/no-go inspection routine. It is also suitable for setting micrometers, verniers, and other comparative measuring devices to a known reference diameter. Typical applications include production floor inspection, incoming material inspection, and calibration of measurement tools in manufacturing and metrology environments.

Key Features

• Class ZZ Minus tolerance of 0.0002 inches for precise NoGo inspection
• Nominal measurement diameter of 0.3105 inches
• Overall length of 2 inches for easy handheld use
• Steel construction with 10 microfinish surface coating
• Includes Certificate of Accuracy with NIST traceability
• Compatible with use as a reference standard for micrometers, verniers, and other measuring devices

Compatibility

Intended for NoGo inspection of bores and holes at 0.3105 inches nominal diameter, and for setting and verifying micrometers, verniers, and other precision measuring devices requiring a traceable reference standard.

Installation Notes

Handle plug pin gages with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Store in the protective case or sleeve when not in use to preserve the finished surface. Do not force the gage into a bore; if it does not enter freely under light hand pressure, the hole is within specification for a NoGo member. Periodic cleaning and re-oiling with a light instrument oil is recommended to maintain accuracy and prevent rust on the steel body.