Spi 29-690-5 Class Zz Plus Plug Gage 0.69 Inch

Product Description

The SPI 29-690-5 is a Class ZZ Plus plug gage designed to verify hole diameters with a nominal measurement diameter of 0.69 inches and a tolerance of 0.0002 inches. Plug gages are go/no-go inspection tools used to confirm that drilled, reamed, or bored holes fall within an acceptable dimensional range. This gage is constructed from steel, providing the hardness and wear resistance required for repeated use in production and inspection environments. Machinists, quality control technicians, and toolroom professionals rely on this type of precision gage to enforce tight tolerances in manufacturing and fabrication workflows.

The 29-690-5 is suited for dimensional inspection of holes in machined components across general manufacturing, aerospace, automotive, and metalworking applications. It is used wherever a 0.69-inch nominal hole diameter must be verified against a defined tolerance specification. The Class ZZ Plus designation indicates a gage accuracy class appropriate for inspection-grade and shop-floor measurement tasks.

Key Features

• Nominal measurement diameter of 0.69 inches for precise hole inspection
• Tolerance of 0.0002 inches supports tight-tolerance inspection work
• Steel construction for durability and resistance to wear during repeated use
• Class ZZ Plus accuracy class suitable for shop-floor and inspection-grade applications
• Compact and lightweight at 0.2 pounds for easy handling

Compatibility

Designed as a standard plug gage for inspecting holes with a 0.69-inch nominal diameter in machined parts and assemblies where Class ZZ Plus gage tolerances apply.

Installation Notes

Plug gages are used by quality control technicians and machinists as part of a dimensional inspection process, not as installed components. Handle the gage carefully to avoid dropping or contacting hard surfaces that could alter its calibration. Clean the gage and the hole being measured before use to ensure accurate results. Store the gage in its case when not in use to protect the precision-ground surface from damage and corrosion.