Spi 29-236-7 Class Zz Plus Plug Gage 0.236 in Dia

Product Description

The SPI 29-236-7 is a Class ZZ Plus plug gage designed to verify the diameter of machined holes to a precise measurement standard. With a nominal diameter of 0.236 inches and a tolerance of 0.0002 inches, this gage provides reliable go/no-go inspection capability for tight-tolerance work. Machined from steel for durability and dimensional stability, it is used in manufacturing, maintenance, and quality-control environments where accurate bore verification is required. Machinists, toolmakers, and quality inspectors use plug gages like this to confirm whether a hole falls within specified dimensional limits.

This plug gage is suited for inspecting small-diameter holes in precision machined components across a range of industries including aerospace, automotive, and general manufacturing. The Class ZZ Plus designation indicates a specific tolerance grade appropriate for production and inspection work where moderate-to-tight measurement accuracy is needed. It is a standard hand-held gage used at the machine, on the bench, or at an inspection station.

Key Features

• Nominal measurement diameter of 0.236 inches for consistent bore verification
• Class ZZ Plus tolerance grade at 0.0002 inches for reliable production inspection
• Steel construction for dimensional stability and extended service life
• Compact and lightweight at 0.2 pounds for easy hand-held use
• Single-piece package quantity suitable for individual inspection stations

Compatibility

Designed as an OEM-style replacement or direct addition for use in any setting requiring plug gage inspection of 0.236-inch nominal diameter holes to Class ZZ Plus tolerance standards.

Installation Notes

Plug gages require no installation in the traditional sense but should be handled carefully to avoid damage to the gage surface. Store the gage in a protective case when not in use and keep it clean and lightly oiled to prevent corrosion on the steel surface. Calibration and periodic re-certification against NIST-traceable standards should be performed in accordance with your facility quality plan. Do not force the gage into a hole; excessive insertion force can damage both the gage and the workpiece.