Spi 29-011-4 Class Zz Plus Plug Gage 0.011 in

Product Description

The SPI 29-011-4 is a Class ZZ Plus plug gage used to verify bore diameters in precision machining and inspection applications. Manufactured from steel, this gage checks a nominal diameter of 0.011 inches with a tolerance of 0.0002 inches, making it suitable for tight-tolerance quality control work. Class ZZ Plus gages are go/no-go style instruments that give machinists and quality technicians a fast, reliable method for confirming hole size compliance without requiring a measuring instrument readout. The 29-011-4 is a compact, single-piece gage designed for bench inspection and production floor use.

This plug gage is used in precision manufacturing environments where small-bore dimensional verification is required. Typical applications include inspection of drilled, reamed, or machined holes in metal components across aerospace, automotive, hydraulic, and general machining industries. At 0.011 inches in diameter, this gage targets very small bore work where conventional calipers or micrometers cannot reliably confirm size. Quality control technicians and machinists performing in-process or final inspection are the primary users.

Key Features

• Class ZZ Plus tolerance class for small-bore go/no-go inspection
• 0.011 inches nominal measurement diameter
• 0.0002 inches tolerance for tight-tolerance dimensional verification
• Steel construction for durability and wear resistance
• Compact single-piece design suited for bench and production floor inspection

Compatibility

Designed as a direct-use Class ZZ Plus plug gage for small-bore inspection applications requiring a 0.011 inches nominal diameter check.

Installation Notes

Plug gages are handled and used by quality control technicians and machinists; no installation in the traditional sense is required. Store the gage in its protective case when not in use to prevent damage to the precision ground surface. Handle with clean, dry hands or cotton gloves to prevent corrosion from skin oils on the steel gage surface. Follow applicable ASME B89.1.5 gage handling and care standards for maintaining gage accuracy and service life.