Spi 19-679-0 Class Zz Minus Plug Pin Gage 0.679 in

Product Description

The SPI 19-679-0 is a Class ZZ minus plug pin gage machined from steel, designed to verify bore and hole diameters to a nominal size of 0.679 inches. This gage uses a minus tolerance of 0.0002 inches, meaning the actual pin diameter is manufactured to the low side of the nominal dimension. Plug pin gages like this one are standard tooling in precision measurement and quality control workflows. Machinists, tool and die makers, and QC inspectors use Class ZZ gages for general-purpose go/no-go inspections and incoming or in-process dimensional verification.

This gage is suited for shop-floor and inspection-room use in manufacturing, machining, and fabrication environments. It is applicable wherever a 0.679-inch nominal bore or hole diameter must be verified against tolerance. Class ZZ is the most common commercial-grade gage class, appropriate for production inspection of parts where high-precision laboratory tolerances are not required. Steel construction provides durability through repeated use in standard shop conditions.

Key Features

• Nominal diameter of 0.679 inches for direct bore and hole verification
• Class ZZ minus tolerance of 0.0002 inches manufactured to the low side of nominal
• Steel construction for durability in production and inspection environments
• General-purpose Class ZZ rating suited for commercial and production-grade go/no-go inspection
• Single-piece package quantity ready for immediate use

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use with any go/no-go gage handle or pin gage set holder accepting a 0.679-inch pin. Suitable for general-purpose dimensional inspection in machining and manufacturing applications.

Installation Notes

Plug pin gages should be handled with clean, dry hands or cotton gloves to prevent corrosion from skin oils. Before use, verify the gage surface is clean and free of burrs or debris that could affect measurement accuracy. Store the gage in a protective case away from other tooling to prevent contact damage. Periodic calibration against a traceable standard is recommended to maintain measurement integrity.