Spi 19-867-1 Class Zz Minus Plug Pin Gage 0.867 in

Product Description

The SPI 19-867-1 is a Class ZZ minus plug pin gage with a 0.867-inch nominal diameter, manufactured from steel for dimensional verification in quality-control and inspection applications. Class ZZ is the standard commercial tolerance class for go/no-go gauging in production environments. This gage is ground and finished to a minus tolerance of 0.0002 inches, meaning the actual diameter is slightly below the nominal, which is the standard convention for a minus plug gage. Inspectors, machinists, and quality technicians use this tool to verify bore sizes and hole diameters to tight tolerances during incoming inspection or in-process checks.

This plug pin gage is suited for use in machine shops, manufacturing facilities, and quality labs where precise bore verification is required. It is commonly used to check drilled, reamed, or bored holes in metal components. The 0.867-inch diameter targets mid-range bore sizes found in a variety of mechanical assemblies. The compact design and steel construction make it durable for repeated use at inspection stations or on the shop floor.

Key Features

• Class ZZ tolerance class — standard commercial grade for production gauging
• Minus tolerance of 0.0002 inches for go-side bore verification
• 0.867-inch nominal diameter for mid-range bore applications
• Steel construction for durability and wear resistance
• Lightweight at 0.2 pounds for easy handling at the inspection station

Compatibility

Designed as a Class ZZ minus plug pin gage for general-purpose bore and hole diameter inspection in production and quality-control environments where 0.867-inch nominal diameter verification is required.

Installation Notes

Plug pin gages are precision measuring instruments and should be handled with care to avoid surface damage that would affect accuracy. Clean the bore and the gage surface before use to prevent debris from causing false readings or wear. Store the gage in its protective case when not in use and apply a light coat of oil to prevent corrosion. Calibration should be verified periodically against a traceable standard per applicable quality-system requirements.