Spi 29-566-7 Class Zz Plus Plug Gage 0.566 in Dia

Product Description

The SPI 29-566-7 is a Class ZZ Plus plug gage designed to verify bore and hole diameters to a nominal size of 0.566 inches. It holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in production and quality-control environments. Machined from steel for durability and dimensional stability, this gage is a standard hand tool for machinists, tool-and-die makers, and quality technicians who need reliable, repeatable hole-diameter verification on the shop floor or in the inspection room.

Class ZZ Plus plug gages are used in general-purpose inspection of drilled, reamed, or bored holes in metal and plastic workpieces. This gage is appropriate for production-level tolerancing where Class ZZ clearance is acceptable. It is a single-end gage suited for use in job shops, manufacturing facilities, and quality labs that require traceable dimensional inspection of holes near the 0.566-inch nominal size.

Key Features

• Class ZZ Plus tolerance class for general-purpose hole inspection
• 0.566-inch nominal diameter measurement
• 0.0002-inch tolerance for consistent go/no-go verification
• Steel construction for wear resistance and dimensional stability
• Compact, single-piece form for easy hand use on the shop floor

Compatibility

Designed as a general-purpose Class ZZ Plus plug gage for inspecting holes with a nominal diameter of 0.566 inches in standard production and quality-control applications.

Installation Notes

Plug gages are used by machinists and quality-control technicians and require no installation. Ensure the workpiece bore is clean and free of chips or coolant before gaging to avoid false readings or gage wear. Store the gage in a protective case away from other tools to prevent nicks or surface damage that could affect accuracy. Periodic calibration against a traceable standard is recommended to maintain measurement integrity.