Spi 29-664-0 Class Zz Plus Plug Gage 0.664 Inch

Product Description

The SPI 29-664-0 is a Class ZZ Plus plug gage used to verify inside diameter dimensions to a nominal size of 0.664 inches. It holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where precise bore verification is required. The gage is constructed from steel for dimensional stability and resistance to wear under regular shop-floor use. Machinists, quality control technicians, and toolroom personnel use plug gages like this one to confirm whether a drilled, reamed, or bored hole falls within a specified tolerance range without relying on electronic measuring instruments.

The 29-664-0 is applied in manufacturing and machine shop environments where bore diameter must be confirmed at incoming inspection, in-process verification, or final acceptance stages. It is appropriate for use on parts produced by drilling, reaming, or boring where the target diameter is 0.664 inches. Class ZZ Plus gages are typically used for production inspection of commercial-tolerance work rather than ultra-precision or gage-room-only applications.

Key Features

• Nominal measurement diameter of 0.664 inches for direct go/no-go bore inspection
• Class ZZ Plus tolerance of 0.0002 inches suits commercial production inspection
• Steel construction provides wear resistance and dimensional stability
• Compact and lightweight at 0.2 pounds for easy handheld use at the machine or inspection bench
• Single-piece packaging allows individual unit procurement with no minimum quantity requirement

Compatibility

Designed as a standard go/no-go plug gage for inspecting inside diameters at 0.664 inches nominal in general machining and manufacturing inspection applications.

Installation Notes

Plug gages are handled and applied by machinists or quality control inspectors and do not require installation in the traditional sense. Before use, ensure the gage and workpiece bore are clean and free of chips, coolant, and debris to prevent false readings and gage wear. Do not force the gage through a bore; apply only light, consistent hand pressure in accordance with standard gaging practice. Store the gage in a protective case away from temperature extremes and other tooling to preserve dimensional accuracy.