Spi 29-666-5 Class Zz Plus Plug Gage 0.666 in Dia

Product Description

The SPI 29-666-5 is a Class ZZ Plus plug gage used to verify bore and hole diameters to a nominal size of 0.666 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, the gage provides reliable dimensional checking for holes and bores where tight tolerances must be confirmed. Metrologists, machinists, and quality technicians use plug gages like this one as a fast, repeatable method for in-process or final inspection without the need for complex measuring instruments.

This plug gage is appropriate for use in machine shops, manufacturing facilities, and precision fabrication environments where hole diameter acceptance criteria must be verified consistently. It is well-suited for checking drilled, reamed, or bored holes in metal, plastic, and composite workpieces. The Class ZZ Plus designation indicates a commercial-grade tolerance class commonly specified for production inspection of general-purpose fits. A single gage member is included per package.

Key Features

• Nominal measurement diameter of 0.666 inches for direct go/no-go hole inspection
• Class ZZ Plus tolerance class rated at 0.0002 inches (0.0051 mm) for production-grade accuracy
• Steel construction provides durability and dimensional stability under repeated use
• Compact single-member design for fast, straightforward in-process inspection
• Package quantity of one gage member per unit

Compatibility

Designed as a standard Class ZZ Plus plug gage for inspection of holes and bores with a nominal diameter of 0.666 inches in general manufacturing and quality assurance applications.

Installation Notes

Plug gages are handled and used by machinists, quality control technicians, and metrologists and do not require permanent installation. Before use, clean the gage and the workpiece bore to remove chips, coolant, and debris that could affect the measurement. Apply light gage oil if recommended by your shop standards to minimize wear and prevent corrosion. Store the gage in its protective case away from other tooling to preserve its tolerance class.