Spi 29-760-6 Class Zz Plus Plug Gage 0.76 Inch

Product Description

The SPI 29-760-6 is a Class ZZ Plus plug gage designed for precise go/no-go measurement of bored, drilled, or reamed holes with a nominal diameter of 0.76 inches. Built from steel, it holds a tolerance of 0.0002 inches, making it suitable for inspection and quality-control work in machine shops, toolrooms, and manufacturing environments. Class ZZ Plus gages are used where tighter tolerance control is needed beyond standard Class ZZ specifications. Machinists, quality technicians, and tool-and-die professionals rely on plug gages like this to verify hole dimensions quickly and accurately during production runs or final inspection.

This gage is applicable to general-purpose hole inspection in toolroom and production settings. It is used to verify that machined holes fall within acceptable dimensional limits before parts advance through the production process. The 0.76-inch diameter makes it a direct fit for inspection of that specific nominal hole size in both ferrous and non-ferrous workpieces.

Key Features

• Class ZZ Plus tolerance rating at 0.0002 inches for precise hole inspection
• 0.76-inch nominal measurement diameter
• Steel construction for wear resistance and dimensional stability
• Go/no-go format supports fast, repeatable pass-fail inspection
• Compact and lightweight at 0.2 pounds for easy handling at the workstation

Compatibility

Designed as an OEM-style plug gage for inspection of holes with a nominal diameter of 0.76 inches, compatible with standard gage handle systems used in toolroom and production inspection applications.

Installation Notes

Plug gages are handled and used by quality technicians and machinists — no permanent installation is required. Store the gage in a clean, dry environment and allow it to reach ambient temperature before use to avoid thermal expansion errors. Wipe the gage and the hole being inspected clean before measurement. Do not force the gage into an undersized hole, as this can damage the gage or alter its calibration.