Vermont Gage 111251400 Class Zz Minus Plug Pin Gage 0.5140 in

Product Description

The VERMONT GAGE 111251400 is a Class ZZ Minus plug pin gage used to perform NoGo inspection of bored, drilled, or reamed holes to a nominal diameter of 0.5140 inches. Manufactured from steel with a 10 micro-inch surface finish, this pin gage provides a tolerance of 0.0002 inches and ships with a Certificate of Accuracy traceable to NIST. At 2 inches in overall length, it is sized for use in standard gage handles or holders. Machinists, quality technicians, and toolroom personnel use pin gages like this one to verify that a hole does not exceed its maximum material condition limit during in-process or final inspection.

This gage is suited for dimensional inspection in machine shops, production floors, and quality labs. It is used as a NoGo member when checking hole size against tolerance limits, and it is also appropriate for setting micrometers, verniers, and other measuring devices to a known reference diameter. The Class ZZ designation indicates a commercial-grade tolerance appropriate for general-purpose inspection work where high-precision gage-block-grade accuracy is not required.

Key Features

• Class ZZ Minus tolerance class — 0.0002 inches tolerance for general-purpose NoGo inspection
• 0.5140 inch nominal diameter for checking hole conformance at the maximum material condition limit
• Steel construction with 10 micro-inch surface finish for wear resistance and dimensional stability
• 2 inches overall length — compatible with standard gage handle holders
• Includes Certificate of Accuracy with NIST traceability for calibration documentation requirements
• Suitable for setting micrometers, verniers, and other variable measuring instruments

Compatibility

Designed for use as a NoGo plug gage in standard gage handle holders sized for 0.5140 inch diameter pin gages, and for setting micrometers, verniers, and other measuring devices requiring a reference diameter in that range.

Installation Notes

Pin gages should be inserted into and withdrawn from the inspected hole smoothly and without forcing — forcing a NoGo gage can damage both the gage and the workpiece. Handle the gage by its body or a proper gage handle to avoid transferring hand heat, which can affect dimensional readings. Store pin gages in a clean, dry environment and clean contact surfaces before each use. Calibration intervals should follow your facility quality management system requirements.