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The SPI 29-098-1 is a Class ZZ Plus plug gage designed to verify bore and hole diameters to a high degree of precision. Built from steel, this go/no-go style gage checks a nominal diameter of 0.098 inches with a tolerance of 0.0002 inches, making it well suited for tight-tolerance quality control work in machining, manufacturing, and assembly environments. Metrology technicians, machinists, and quality inspectors use plug gages like this to confirm that drilled, reamed, or bored features meet print specifications before parts move to the next stage of production.
This gage is intended for use on small-diameter features in precision manufacturing settings. Class ZZ Plus designation indicates it meets specific accuracy standards appropriate for inspection of production parts where dimensional verification is critical. It is a single-piece, hand-held instrument requiring no power source and minimal setup time, making it practical for both bench inspection and floor-level spot checks.
Designed as a go/no-go inspection tool for holes and bores with a nominal diameter of 0.098 inches in precision machining and manufacturing applications.
Plug gages are used by quality control technicians and machinists and require no installation in the traditional sense. Before use, ensure the gage and workpiece are at the same temperature to avoid thermal expansion errors. Clean the gage and the feature being measured with a lint-free cloth before inspection. Store the gage in its protective case when not in use to prevent surface damage that could affect accuracy.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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