Spi 29-492-6 Class Zz Plus Plug Gage 0.492 in

Product Description

The SPI 29-492-6 is a Class ZZ Plus plug gage used to verify bore diameters in precision machining and quality control applications. It measures a nominal diameter of 0.492 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where tight dimensional control is required. Constructed from steel, this gage provides the durability needed for repeated use in shop-floor or inspection-room environments. Machinists, toolroom technicians, and quality inspectors rely on plug gages like this one to confirm hole size conformance to print specifications quickly and accurately.

The 29-492-6 is intended for use in dimensional inspection of machined bores, drilled holes, and reamed features in manufacturing and fabrication settings. It is well suited to both production line inspection and bench-level quality checks. At 0.492 inches nominal diameter, it covers a common bore size found in a range of mechanical assemblies. This gage is appropriate for any trade or production environment where bore diameter verification to close tolerance is part of the standard inspection workflow.

Key Features

• Class ZZ Plus tolerance grade for precise go/no-go bore inspection
• 0.492 inch nominal measurement diameter
• 0.0002 inch tolerance for close-tolerance verification
• Steel construction for wear resistance and dimensional stability
• Compact and lightweight at 0.2 pounds for easy bench or floor use

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go inspection of machined bores and holes with a nominal diameter of 0.492 inches in general precision manufacturing applications.

Installation Notes

Plug gages are used by machinists and quality technicians and require no installation in the traditional sense. Before use, clean both the gage and the bore with a lint-free cloth to remove chips, oils, or debris that could affect the measurement reading. Handle the gage carefully to avoid dropping or striking it against hard surfaces, as impact damage can alter its calibration. Store the gage in a protective case away from temperature extremes to maintain dimensional accuracy over time.