Spi 19-722-8 Class Zz Minus Plug Pin Gage 0.722 in

Product Description

The SPI 19-722-8 is a Class ZZ minus plug pin gage with a 0.722-inch nominal diameter, manufactured from steel for reliable dimensional inspection work. It is used to verify hole and bore dimensions to a tolerance of 0.000200 inches, making it suited for go/no-go gauging applications in production and quality control environments. The minus designation means the gage is ground to the low side of the tolerance band, following standard Class ZZ specifications. Machinists, tool and die makers, and quality technicians install and use these gages as part of routine inspection workflows on the shop floor or in a metrology lab.

This plug pin gage is appropriate for checking bored, drilled, reamed, or machined holes in a wide range of manufacturing and fabrication settings. It is used in both light production and general inspection environments where Class ZZ tolerances are acceptable. The 0.722-inch diameter size fits applications where precise hole acceptance criteria must be confirmed quickly and repeatably without the use of indicating instruments.

Key Features

• Nominal diameter of 0.722 inches for direct hole-size verification
• Class ZZ tolerance of 0.000200 inches for general-purpose inspection use
• Minus designation ground to the low side of the tolerance band
• Steel construction for durability and dimensional stability under shop conditions
• Single-piece design suited for go/no-go gauging workflows

Compatibility

Designed as an OEM-style replacement or direct-use plug pin gage for quality inspection stations requiring a Class ZZ minus gage at 0.722 inches nominal diameter.

Installation Notes

Plug pin gages are handled and used by machinists, quality technicians, and metrologists. Clean the gage and the workpiece bore before use to prevent debris from affecting readings. Store the gage in its protective case when not in use to prevent corrosion or surface damage that could affect accuracy. Do not force the gage into a hole; resistance indicates the bore is undersize and forcing the gage may damage the gage or the workpiece.