Spi 29-225-0 Class Zz Plus Plug Gage 0.225 in Dia

Product Description

The SPI 29-225-0 is a Class ZZ Plus plug gage used to verify the diameter of drilled, reamed, or bored holes to a nominal size of 0.225 inches. It holds a tolerance of 0.0002 inches, making it suitable for general-purpose go/no-go inspection work in manufacturing, machining, and quality control environments. The gage is constructed from steel for wear resistance and dimensional stability during repeated use. Machinists, quality technicians, and tool-room professionals use plug gages like this one as part of standard in-process or final inspection routines.

This gage is used wherever a 0.225-inch hole requires dimensional verification against a specified tolerance. Typical applications include inspection of machined bores, fixture holes, and precision-drilled components in metalworking and fabrication shops. It is also used on the shop floor for incoming and outgoing quality checks. The Class ZZ designation identifies it as a working-grade gage appropriate for production inspection rather than master or reference standards.

Key Features

• Nominal diameter of 0.225 inches for direct hole-size verification
• Class ZZ Plus tolerance of 0.0002 inches for working-grade inspection accuracy
• Steel construction for durability and dimensional stability under repeated use
• Compact, single-piece form suited for hand-held go/no-go inspection routines
• Single-unit packaging allows replacement or addition of individual gage sizes

Compatibility

Designed as an OEM-style working gage for use in standard plug gage handles and holders sized to accept 0.225-inch class plug gage members.

Installation Notes

Plug gages are handled and used by machinists or quality control technicians and do not require power tools or electrical work. Store the gage in a clean, dry environment and handle it with clean hands or lint-free gloves to prevent corrosion and dimensional contamination. Do not force the gage into a hole; excessive insertion force can damage both the gage and the workpiece. Calibrate or verify the gage against a traceable standard at intervals appropriate to your quality management system.