Spi 19-208-8 Class Zz Minus Plug Pin Gage 0.208 in

Product Description

The SPI 19-208-8 is a Class ZZ minus plug pin gage machined from steel, designed to check hole diameters in precision manufacturing and inspection applications. With a nominal diameter of 0.208 inches and a tolerance of 0.0002 inches, this gage provides the accuracy needed for go/no-go inspection workflows on production floors, machine shops, and quality control stations. Class ZZ is the standard tolerance grade for general-purpose plug gages, making this tool appropriate for incoming inspection, in-process checks, and final part verification. Machinists, quality technicians, and tool room personnel are the primary users.

This pin gage is suited for inspecting drilled, reamed, or bored holes in metal, plastic, and composite workpieces where a 0.208-inch nominal diameter is specified. It fits standard gage handle holders and can be used as a standalone pin for hand-held checking. The minus designation indicates the gage is manufactured to the lower half of the Class ZZ tolerance band, which is the correct configuration for a go-type plug gage application.

Key Features

• 0.208-inch nominal diameter for direct hole inspection at that size
• Class ZZ tolerance grade — standard for general-purpose plug gage inspection
• Minus tolerance configuration suitable for go-gage applications
• Steel construction for durability in production and inspection environments
• 0.0002-inch tolerance for precise dimensional verification

Compatibility

Designed as an OEM-style replacement or direct-use plug gage compatible with standard gage handle holders sized for the 0.208-inch diameter range.

Installation Notes

Plug pin gages are installed and used by machinists and quality control technicians following standard inspection procedures. Handle the gage with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Verify the gage is clean and free of burrs or debris before use, and store it in a protective case when not in service to preserve dimensional accuracy. Do not force the gage into an undersized hole, as this can damage the gage land and alter its calibration.