Spi 29-226-8 Class Zz Plus Plug Gage 0.226 in Dia

Product Description

The SPI 29-226-8 is a Class ZZ Plus plug gage used to verify the diameter of machined holes and bores. It provides a go/no-go style reference for confirming that a hole falls within acceptable dimensional limits. Built from steel, this gage is suited for production floor inspection, incoming quality control, and toolroom use. The nominal measurement diameter is 0.226 inches with a tolerance of 0.0002 inches, placing it in the ZZ Plus accuracy class for precision dimensional verification. Machinists, quality technicians, and tool and die makers rely on this type of gage for fast, repeatable hole-size confirmation.

This plug gage is intended for use on drilled, reamed, or bored holes requiring close dimensional control. It is well suited to light manufacturing, job shops, and inspection departments where small-diameter hole verification is a routine step in the quality process. The 0.226-inch diameter range covers common drill and reamer sizes in that nominal range.

Key Features

• Class ZZ Plus tolerance class for precision hole measurement
• 0.226-inch nominal measurement diameter
• 0.0002-inch tolerance for close dimensional control
• Steel construction for durability 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 small-diameter holes in general machining and inspection applications.

Installation Notes

Plug gages are handled and used by quality technicians and machinists and do not require mechanical installation. Clean the gage and the workpiece hole before use to prevent debris from affecting the reading. Store the gage in its case or on a protected surface to avoid nicks or wear on the gaging surface. Handle with care to preserve the tolerance accuracy of the ground diameter.