Spi 29-920-6 Class Zz Plus Plug Gage 0.92 Inch

Product Description

The SPI 29-920-6 is a Class ZZ Plus plug gage designed for precision bore measurement in manufacturing and inspection environments. It checks a nominal hole diameter of 0.92 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work where dimensional accuracy is critical. Constructed from steel, this gage provides the durability and wear resistance required for repetitive use on production floors. Machinists, quality technicians, and toolroom professionals use plug gages like this to verify that bored, drilled, or reamed holes fall within specified tolerances before parts move to the next stage of production.

This plug gage is appropriate for use in precision machining, metalworking, and quality control inspection settings. It is sized for applications requiring verification of a 0.92-inch diameter bore, a common size encountered in both prototype and production machining contexts. Class ZZ Plus gages are typically used for inspection of commercial-grade tolerance work and are a standard tool in toolrooms and inspection departments handling steel or aluminum components.

Key Features

• Nominal measurement diameter of 0.92 inches for direct bore inspection
• Tolerance of 0.0002 inches for reliable Class ZZ Plus classification
• Steel construction for durability and dimensional stability under repeated use
• Compact and lightweight at 0.2 pounds for easy handling during inspection
• Single-piece packaging suitable for individual toolroom or bench use

Compatibility

Designed as a standard Class ZZ Plus plug gage for use with any bore or hole inspection application requiring a 0.92-inch nominal diameter measurement.

Installation Notes

Plug gages are handled and used by quality technicians and machinists and require no permanent installation. Before use, clean the gage and the bore being inspected to remove chips, coolant, and debris that could cause false readings or damage the gage surface. Handle with care to avoid dropping, as impact can alter the gage geometry and compromise measurement accuracy. Store in a protective case away from temperature extremes to maintain dimensional stability.