Spi 29-433-0 Class Zz Plus Plug Gage 0.433 in

Product Description

The SPI 29-433-0 is a Class ZZ Plus plug gage designed to verify bore and hole diameters with precision in production and inspection environments. Built from steel, this go/no-go style gage checks a nominal diameter of 0.433 inches with a tolerance of 0.0002 inches, making it suitable for applications where tight dimensional control is required. Machinists, quality technicians, and tool-room professionals use plug gages like this to confirm that machined bores fall within specification before parts advance to the next stage of production or assembly.

This plug gage is suited for use in machine shops, manufacturing facilities, and quality inspection stations. It is appropriate for checking holes in metal components where a 0.433-inch nominal bore diameter must be confirmed to specification. The Class ZZ Plus designation indicates a commercial-grade tolerance class commonly used for general production inspection work rather than master or reference gage applications.

Key Features

• Nominal measurement diameter of 0.433 inches for precise bore inspection
• Tolerance of 0.0002 inches meets Class ZZ Plus classification requirements
• Steel construction provides durability and wear resistance in shop environments
• Compact and lightweight at 0.2 pounds for easy hand use during inspection
• Single-piece package quantity supports individual or small-lot procurement

Compatibility

Designed as a direct-use plug gage for any application requiring inspection of a 0.433-inch nominal bore diameter at Class ZZ Plus tolerance. Compatible with standard gage handle sets that accept plug gage blanks of the corresponding diameter range.

Installation Notes

Plug gages are handled and used by quality technicians and machinists and do not require installation in the traditional sense. Before use, clean the gage and the bore being inspected to remove chips, coolant, and debris that could affect the reading. Allow both the gage and the workpiece to reach the same ambient temperature, typically 68 degrees F per ASME B89 standards, before performing inspection to avoid thermal expansion errors. Do not force the gage into the bore; if resistance is felt, the bore is undersize and should be returned for additional machining.