Spi 29-476-9 Class Zz Plus Plug Gage 0.476 in

Product Description

The SPI 29-476-9 is a Class ZZ Plus plug gage used to verify hole diameters to a nominal size of 0.476 inches with a tolerance of 0.0002 inches. Plug gages are go/no-go measurement tools used to confirm that a machined bore or drilled hole falls within a specified dimensional tolerance. This gage is constructed of steel for durability and dimensional stability. It is used by machinists, toolmakers, quality control technicians, and precision metalworking professionals who need fast, reliable dimensional verification during production or inspection.

Class ZZ Plus plug gages are suited for general-purpose inspection of production holes where close dimensional control is required. The 0.476-inch nominal diameter makes this gage applicable to drilled, reamed, or bored holes in that size range across a wide variety of machined components in manufacturing, maintenance, and toolroom environments. A single gage is included per package, making it easy to stock individually or as part of a larger gage set.

Key Features

• Nominal measurement diameter of 0.476 inches for precise hole inspection
• Class ZZ Plus tolerance of 0.0002 inches ensures reliable go/no-go verification
• Steel construction provides durability and resistance to wear during repeated use
• Compact and lightweight at 0.2 pounds for easy handling at the bench or on the floor
• Single-piece package supports individual stocking or integration into a gage set

Compatibility

Designed as an OEM-style precision measurement tool suitable for inspecting holes with a nominal diameter of 0.476 inches in standard machining and quality control applications.

Installation Notes

Plug gages are handled and used by machinists and quality control inspectors and do not require installation in the traditional sense. Clean both the gage and the workpiece bore before use to prevent debris from affecting measurement accuracy. Store the gage in a protective case or rack away from other tooling to avoid surface damage. Handle with care to prevent drops, which can alter the gage geometry and compromise accuracy.