Spi 29-509-7 Class Zz Plus Plug Gage 0.509 in

Product Description

The SPI 29-509-7 is a Class ZZ Plus plug gage used to verify bore diameters to a precise 0.509-inch nominal size. It holds a tolerance of 0.0002 inches, meeting the accuracy demands of go/no-go inspection routines on the shop floor or in a quality control setting. The gage is constructed from steel for durability under repeated use. Machinists, quality technicians, and tool and die professionals use plug gages like this one to confirm that drilled, reamed, or bored holes fall within specification before parts advance in the production process.

This gage is suited for dimensional inspection applications in manufacturing, machining, and precision fabrication environments. It is appropriate for use wherever a 0.509-inch bore must be verified for conformance to tight tolerances. The Class ZZ Plus designation indicates a working-grade gage intended for production inspection rather than laboratory or master-gage calibration use. It is a standard single-piece unit packaged individually.

Key Features

• 0.509-inch nominal measurement diameter for go/no-go bore inspection
• 0.0002-inch tolerance for high-accuracy dimensional verification
• Steel construction for wear resistance and long service life
• Class ZZ Plus designation suits production-floor inspection workflows
• Compact and lightweight at 0.2 pounds for easy single-handed use

Compatibility

Designed for use in any application requiring dimensional verification of a 0.509-inch nominal bore diameter in production or quality inspection environments.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians. Clean the gage and the bore being measured before use to prevent debris from affecting the reading. Do not force the gage into an undersized hole, as this can damage the gage surface and compromise its accuracy. Store the gage in a protective case and have it recalibrated periodically per your facility quality system requirements.