Spi 29-649-1 Class Zz Plus Plug Gage 0.649 in

Product Description

The SPI 29-649-1 is a Class ZZ Plus plug gage designed for go/no-go inspection of 0.649-inch diameter holes. It verifies that a machined bore or drilled hole falls within acceptable tolerance limits, providing a quick pass/fail result without the need for electronic measurement equipment. The gage is manufactured from steel and holds a tolerance of 0.0002 inches, making it suitable for quality control applications where dimensional accuracy is critical. Machinists, toolroom technicians, and quality control inspectors commonly use plug gages like this one during in-process and final inspection routines.

This plug gage is used in manufacturing, machining, and inspection environments where hole diameter conformance must be verified to tight tolerances. Class ZZ Plus gages are appropriate for general-purpose inspection of production parts, incoming material checks, and shop-floor dimensional verification. The 0.649-inch nominal size targets a specific bore dimension that appears in a range of mechanical assemblies and machined components requiring controlled fit.

Key Features

• Class ZZ Plus tolerance class for general-purpose dimensional inspection
• 0.649-inch nominal diameter for precise bore verification
• 0.0002-inch tolerance for tight dimensional control
• Steel construction for durability and wear resistance in shop environments
• Single-piece unit weight of 0.2 pounds for easy hand use

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for inspection of 0.649-inch nominal diameter bores in general machining and manufacturing applications.

Installation Notes

Plug gages are handled and used by machinists or quality control technicians and require no installation in the traditional sense. Store the gage in a protective case when not in use to prevent damage to the precision ground surfaces. Do not force the gage into a bore; excessive insertion force can damage both the gage and the workpiece. Periodic recalibration against traceable standards is recommended to maintain measurement integrity over time.