Spi 29-698-8 Class Zz Plus Plug Gage 0.698 in

Product Description

The SPI 29-698-8 is a Class ZZ Plus plug gage designed for go/no-go inspection of bored holes and machined openings with a nominal diameter of 0.698 inches. Built to Class ZZ Plus tolerance standards, this gage holds a dimensional tolerance of 0.0002 inches (0.0051 mm), making it suitable for production-floor inspection tasks where consistent, repeatable measurement is required. The steel construction provides long-term wear resistance under regular shop use. Machinists, tool and die makers, and quality control technicians use plug gages like this one to verify hole size quickly and accurately without requiring a dedicated measuring instrument for each check.

This plug gage is used in manufacturing and machining environments where hole diameter conformance must be verified to print. Typical applications include inspection of drilled, reamed, or bored holes in metal and plastic components during production runs or incoming inspection. The 0.698-inch nominal size covers a common diameter range found in general mechanical assembly and light manufacturing work. Its compact, lightweight form — at 0.2 pounds — makes it easy to handle at the machine or inspection bench.

Key Features

• Nominal measurement diameter of 0.698 inches for precise hole inspection
• Class ZZ Plus tolerance of 0.0002 inches for reliable go/no-go verification
• Steel construction for durability and resistance to wear in shop environments
• Lightweight at 0.2 pounds for easy single-hand operation
• Single-piece packaging — no assembly required, ready to use out of the box

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go inspection of holes with a nominal diameter of 0.698 inches in general machining and manufacturing applications.

Installation Notes

Plug gages are handled and used by machinists, quality technicians, and inspectors — no power-down or lockout procedure is required. Store the gage in a protective case and keep it clean and lightly oiled when not in use to prevent corrosion and maintain accuracy. Do not force the gage into an undersized hole, as this can damage the gage surface and compromise calibration. Periodic recalibration against traceable standards is recommended to maintain measurement integrity.