Spi 29-970-1 Class Zz Plus Plug Gage 0.97 in Steel

Product Description

The SPI 29-970-1 is a Class ZZ Plus plug gage used to verify bore and hole diameters in precision machining and inspection applications. Manufactured from steel, this go/no-go style gage checks a nominal diameter of 0.97 inches with a tolerance of 0.0002 inches, providing the accuracy required for close-tolerance production work. Class ZZ Plus gages are designed for use in inspection departments, machine shops, and manufacturing environments where consistent dimensional verification is required. The 29-970-1 weighs 0.2 pounds, making it easy to handle during routine checks.

This plug gage is suited for inspecting machined holes, bored features, and drilled openings in steel, aluminum, and other workpiece materials where hole size conformance must be confirmed. It is appropriate for use in manufacturing, tool rooms, and quality control environments. The gage is typically used by machinists, quality inspectors, and toolmakers performing in-process or final inspection tasks requiring traceable dimensional measurement.

Key Features

• Class ZZ Plus tolerance rating for precision hole diameter verification
• 0.97 inch nominal diameter with 0.0002 inch tolerance
• Steel construction for durability in shop and inspection environments
• Lightweight at 0.2 pounds for easy single-hand use
• Individual unit packaging suitable for single-gage inventory management

Compatibility

Designed as an OEM-style Class ZZ Plus plug gage for verifying machined holes and bored features at 0.97 inches nominal diameter in standard industrial inspection applications.

Installation Notes

Plug gages should be handled by qualified machinists or quality inspectors following shop calibration and gage-handling procedures. Clean the gage and the workpiece bore before use to prevent debris from affecting measurement accuracy. Store in a protective case away from temperature extremes to maintain dimensional stability. Do not force the gage into an undersized bore, as this can damage the gage surface and compromise calibration.