Spi 29-479-3 Class Zz Plus Plug Gage 0.479 in Dia

Product Description

The SPI 29-479-3 is a Class ZZ Plus plug gage designed to verify bore and hole diameters to a nominal size of 0.479 inches. It is manufactured from steel and holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work on machined bores in production and quality-control environments. Machinists, tool-and-die workers, and quality inspectors use this gage to confirm that drilled, reamed, or bored holes fall within specified dimensional limits. The compact size and steel construction support reliable, repeatable measurements during incoming inspection or in-process checks on the shop floor.

This plug gage is used in manufacturing and machining environments where precise hole-diameter verification is required. Typical applications include inspection of drilled or reamed holes in metal components across light manufacturing, aerospace, and general industrial settings. The 0.479-inch diameter corresponds to a specific nominal bore size and is used wherever that dimension must be confirmed to a tight tolerance during part inspection.

Key Features

• Nominal measurement diameter of 0.479 inches for direct bore verification
• Class ZZ Plus tolerance rating of 0.0002 inches for high-accuracy go/no-go inspection
• Steel construction for durability and dimensional stability under regular shop use
• Compact, single-unit design suited for handheld inspection tasks
• Package quantity of one gage per unit for straightforward ordering

Compatibility

Designed as a Class ZZ Plus go/no-go plug gage for verifying bores and holes with a nominal diameter of 0.479 inches in standard machined components.

Installation Notes

Plug gages are handled and used by machinists, quality control inspectors, and tool-and-die technicians. No power source or lockout procedure is required. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain dimensional accuracy. Do not force the gage into an undersized bore, as this can damage both the gage and the workpiece.