Spi 29-665-7 Class Zz Plus Plug Gage 0.665 in Dia

Product Description

The SPI 29-665-7 is a Class ZZ Plus plug gage designed to verify that a machined hole or bore meets its dimensional tolerance. The gage measures a nominal diameter of 0.665 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection tasks in precision machining and manufacturing environments. Constructed from steel, this plug gage provides the durability needed for repetitive use in shop-floor quality control. Machinists, toolroom technicians, and quality assurance inspectors use plug gages like this one to confirm bore size conformance quickly and consistently.

This gage is used in applications where tight dimensional control of cylindrical bores is required. It is appropriate for use in light manufacturing, toolroom inspection, job shop environments, and production QC stations. The 0.665-inch nominal size covers a common range found in precision-drilled and reamed holes in mechanical assemblies. Its compact form and single-diameter design make it easy to deploy at the point of manufacture for in-process checks or final inspection.

Key Features

• Class ZZ Plus tolerance grade for reliable go/no-go inspection accuracy
• 0.665-inch nominal measurement diameter
• 0.0002-inch tolerance for precise bore verification
• Steel construction for durability under repeated use
• Single-piece plug design for straightforward handling at the point of inspection

Compatibility

Designed as a Class ZZ Plus plug gage for go/no-go inspection of cylindrical bores with a nominal diameter of 0.665 inches in precision machining and manufacturing applications.

Installation Notes

Plug gages are handled and used by machinists, toolroom technicians, and quality control inspectors rather than installed in the traditional sense. Before use, ensure the gage and the bore being inspected are clean and free of chips, oil, or debris that could affect the measurement. Store the gage in its protective case when not in use to prevent wear or corrosion on the gauging surfaces. Calibration and periodic comparison against master standards is recommended to maintain measurement integrity over time.