Spi 29-198-9 Class Zz Plus Plug Gage 0.198 in

Product Description

The SPI 29-198-9 is a Class ZZ Plus plug gage used to verify bore and hole diameters to a tight tolerance of 0.0002 inches. Manufactured from steel, this go/no-go style precision gage provides machinists, quality technicians, and tool-and-die professionals with a reliable, hand-held method for checking whether a 0.198-inch diameter hole falls within acceptable dimensional limits. Class ZZ Plus designation indicates the gage meets tolerance standards appropriate for production inspection and general shop-floor measurement applications where consistent, repeatable results are required.

This plug gage is suited for use in machine shops, manufacturing facilities, and production inspection environments. It is used to check drilled, reamed, or bored holes with a nominal diameter of 0.198 inches. The compact form factor and steel construction make it practical for both bench inspection and inline quality checks during production runs. Trade professionals performing dimensional verification on metal components will find this gage appropriate for standard go/no-go pass-fail inspection routines.

Key Features

• Class ZZ Plus tolerance class for production-grade dimensional inspection
• 0.198-inch nominal measurement diameter
• 0.0002-inch tolerance for precise pass-fail verification
• Steel construction for durability in shop environments
• Compact, lightweight design at 0.2 pounds for easy handling

Compatibility

Designed as an OEM-style replacement and standard inspection tool for verifying 0.198-inch nominal diameter bores in production and quality control applications.

Installation Notes

Plug gages are handled and used by quality control technicians and machinists — no power source or mechanical installation is required. Keep the gage clean and lightly oiled when stored to prevent corrosion on the steel surfaces. Do not force the gage into a bore; resistance indicates the hole is undersize and should be flagged for rework. Calibrate or verify the gage against a known master reference on a regular schedule to maintain measurement integrity.