Spi 29-573-3 Class Zz Plus Plug Gage 0.573 in

Product Description

The SPI 29-573-3 is a Class ZZ Plus plug gage designed to verify that a bored, drilled, or reamed hole meets a specified diameter tolerance. It measures 0.573 inches in diameter and holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in machining and fabrication environments. Constructed from steel, this gage provides the dimensional stability required for repeatable measurements. Machinists, toolroom technicians, and quality control inspectors use plug gages like this one to confirm hole size compliance on production parts and finished assemblies.

The 29-573-3 is used in machine shops, manufacturing facilities, and toolrooms where close-tolerance hole inspection is required. It is well suited for verifying holes produced by drilling, reaming, or boring operations. This gage is appropriate for both incoming inspection of purchased components and in-process quality checks on machined parts where 0.573-inch diameter holes must fall within a defined tolerance band.

Key Features

• Class ZZ Plus tolerance grade for go/no-go hole inspection
• 0.573 inches nominal diameter
• 0.0002 inches tolerance for close-tolerance measurement work
• Steel construction for dimensional stability and wear resistance
• Compact and lightweight at 0.2 pounds for easy bench or floor use

Compatibility

Designed as a standard Class ZZ Plus plug gage for verifying 0.573-inch diameter holes produced by drilling, reaming, or boring operations in general machining and inspection applications.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians, not installed in a mechanical system. Clean the gage and the hole to be measured before use to prevent debris from affecting the reading. Do not force the gage into a hole; forced insertion can damage both the gage and the workpiece. Store in a protective case away from other tooling to prevent nicks or corrosion that would affect accuracy.