Spi 29-069-2 Class Zz Plus Plug Gage 0.069 in

Product Description

The SPI 29-069-2 is a Class ZZ Plus plug gage used to verify the diameter of precision holes and bores. It measures a nominal diameter of 0.069 inches with a tolerance of 0.0002 inches, making it appropriate for tight-tolerance inspection work. Constructed from steel for durability and dimensional stability, this gage provides a reliable go/no-go reference for machinists, quality inspectors, and toolroom technicians working in manufacturing, fabrication, and precision assembly environments. The Class ZZ Plus designation indicates it meets standard tolerances for general-purpose inspection gaging.

This plug gage is suited for inspecting small-diameter holes in machined components, castings, and assemblies where precise bore sizing is critical. It is commonly used in production quality control, incoming inspection, and toolroom verification tasks. The compact size and single-piece construction make it straightforward to use with standard gage handling practices.

Key Features

• 0.069 inch nominal measurement diameter for small-bore inspection
• 0.0002 inch tolerance for precise go/no-go verification
• Steel construction for wear resistance and dimensional stability
• Class ZZ Plus designation meets recognized plug gage standards
• Single-piece design for simple, direct hole inspection

Compatibility

Designed as a standard Class ZZ Plus plug gage for general-purpose inspection of 0.069 inch diameter bores in machined parts and assemblies.

Installation Notes

Plug gages are handled and used by machinists, quality inspectors, and toolroom personnel. Before use, ensure the gage and the part being inspected are clean and free of burrs, chips, or debris that could affect measurement accuracy. Store the gage in its protective case when not in use to prevent damage to the precision ground surface. Do not force the gage into a bore, as this can cause wear or damage to both the gage and the workpiece.