Spi 29-208-6 Class Zz Plus Plug Gage 0.208 Inch

Product Description

The SPI 29-208-6 is a Class ZZ Plus plug gage used to verify the inside diameter of machined holes and bored features to a nominal size of 0.208 inches. It holds a tolerance of 0.0002 inches (0.0002 mm), making it suitable for close-tolerance inspection work in production and quality-control environments. Constructed from steel, the gage provides the hardness and dimensional stability required for repetitive go/no-go measurement tasks. Machinists, quality technicians, and tool-and-die professionals rely on this type of instrument when confirming hole diameter conformance to print specification.

Class ZZ Plus plug gages are commonly used in manufacturing shops, job shops, and inspection departments for in-process and final inspection of drilled, reamed, or bored holes. The 0.208-inch size fits applications where precise inside-diameter verification is required at that specific nominal dimension. This gage is appropriate for both one-piece and high-volume production inspection scenarios where reliable, repeatable measurement is critical.

Key Features

• Nominal measurement diameter of 0.208 inches for precise hole inspection
• Class ZZ Plus tolerance of 0.0002 inches ensures close-tolerance go/no-go verification
• Steel construction provides hardness and long-term dimensional stability
• Compact and lightweight at 0.2 pounds for easy single-hand use during inspection
• Single-piece packaging suitable for individual replacement or addition to gage sets

Compatibility

Designed as a standard Class ZZ Plus plug gage for inspecting machined holes with a nominal inside diameter of 0.208 inches in accordance with general plug gage tolerance standards.

Installation Notes

Plug gages are handled and used by quality technicians and machinists and do not require installation in the traditional sense. Clean the gage and the workpiece bore before use to prevent measurement error from debris or cutting fluid. Store the gage in its protective case when not in use to prevent surface damage or corrosion that could affect tolerance accuracy. Never force a plug gage into an undersized hole, as this can damage the gage surface and invalidate future measurements.