Spi 29-022-1 Class Zz Plus Plug Gage 0.022 in

Product Description

The SPI 29-022-1 is a Class ZZ Plus plug gage used to verify hole diameters in precision machining and quality-control applications. It measures a nominal diameter of 0.022 inches with a tolerance of 0.0002 inches, making it suitable for close-tolerance inspection work where dimensional accuracy is critical. Constructed from steel for durability and wear resistance, this plug gage is a go/no-go style instrument used by machinists, toolmakers, and quality inspectors to confirm that drilled, reamed, or bored holes fall within specification.

This gage is appropriate for use in precision manufacturing environments, including job shops, production floors, and inspection labs. Class ZZ Plus gages are typically used for inspection of parts requiring tighter dimensional control than standard commercial tolerances. The compact size of this 0.022-inch gage makes it well suited for small-diameter hole verification on close-tolerance components.

Key Features

• Nominal measurement diameter of 0.022 inches for small-bore inspection
• Class ZZ Plus tolerance of 0.0002 inches for close-tolerance verification
• Steel construction for wear resistance and dimensional stability
• Lightweight at 0.2 pounds for easy bench or field use
• Sold individually — one gage per package

Compatibility

Designed as a go/no-go inspection tool for small-diameter holes in precision-machined components requiring a 0.022-inch nominal bore diameter.

Installation Notes

Plug gages are handled and used by machinists, toolmakers, and quality-control technicians. Store gages in a protective case when not in use to prevent damage to the precision ground surfaces. Clean the gage and the hole being measured before inspection to ensure accurate readings. Do not force the gage into a hole — resistance indicates the hole is undersize or contains debris.