Spi 29-590-7 Class Zz Plus Plug Gage 0.59 in Steel

Product Description

The SPI 29-590-7 is a Class ZZ Plus plug gage designed for precision bore and hole measurement in machining, manufacturing, and inspection applications. Built from steel, this plug gage measures a nominal diameter of 0.59 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where dimensional accuracy is critical. It is a single-ended gage used by machinists, quality control technicians, and tool-and-die professionals to verify that a drilled or reamed hole falls within specified dimensional limits.

This gage is appropriate for use in machine shops, production floors, and inspection departments handling precision metal components. Class ZZ Plus gages are typically used for checking holes in tooling, fixtures, and manufactured parts where close tolerances must be confirmed before assembly or further processing. The compact size and steel construction make it well suited for frequent, repetitive inspection tasks in industrial environments.

Key Features

• 0.59 inch nominal measurement diameter for precise bore inspection
• 0.0002 inch tolerance meets Class ZZ Plus accuracy requirements
• Steel construction for durability and wear resistance in shop environments
• Single-piece design suited for go/no-go hole verification
• Lightweight at 0.2 pounds for easy handling during inspection

Compatibility

Designed as a direct-use Class ZZ Plus plug gage for inspecting holes and bores with a nominal diameter of 0.59 inches in standard machining and manufacturing inspection setups.

Installation Notes

Plug gages are handled by quality control technicians and machinists and require no permanent installation. Store the gage in a protective case when not in use to prevent damage to the precision-ground surface. Clean the gage and the bore being checked before use to ensure accurate readings. Avoid forcing the gage into an undersized hole, as this can damage both the gage and the workpiece.