Spi 29-363-9 Class Zz Plus Plug Gage 0.363 in

Product Description

The SPI 29-363-9 is a Class ZZ Plus plug gage designed to verify the dimensional accuracy of bored, drilled, or reamed holes at a nominal diameter of 0.363 inches. It holds a tolerance of 0.0002 inches, making it appropriate for standard go/no-go inspection work in production and quality-control environments. Constructed from steel, the gage provides the hardness and wear resistance expected in repetitive gauging applications. Machinists, tool-and-die makers, and quality inspectors use plug gages like this to confirm that internal hole dimensions fall within specified limits before parts advance to the next stage of assembly or finishing.

This gage is suited for use on the shop floor or in an inspection room wherever holes near 0.363 inches in diameter must be verified to print. Typical applications include checking machined bores in metal components across general manufacturing, aerospace supply, automotive, and precision fabrication shops. Class ZZ Plus designation indicates this gage meets standard commercial-grade accuracy requirements for plug-gage inspection tooling.

Key Features

• Nominal diameter of 0.363 inches for direct hole-size verification
• Tolerance of 0.0002 inches meets Class ZZ Plus accuracy classification
• Steel construction provides durability and wear resistance in production use
• Compact form factor at 0.2 pounds — easy to handle during inspection
• Single-piece packaging supports individual purchase for targeted inspection needs

Compatibility

Designed as a standard Class ZZ Plus plug gage for verifying internal hole diameters of 0.363 inches in machined metal parts across general manufacturing inspection applications.

Installation Notes

Plug gages are handled and used by machinists, quality inspectors, and metrologists — no power tools or electrical shutoff procedures apply. Store the gage in a clean, dry environment and allow it to reach ambient temperature before use to avoid thermal expansion errors. Do not force the gage through a hole; if resistance is felt beyond normal hand pressure, the bore is undersize. Clean the gage and the workpiece bore before each measurement to prevent debris from affecting readings.