Spi 29-710-1 Class Zz Plus Plug Gage 0.71 Inch

Product Description

The SPI 29-710-1 is a Class ZZ Plus plug gage designed for precision bore and hole diameter inspection in machining, manufacturing, and quality-control applications. It measures a nominal diameter of 0.71 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go verification where tight dimensional accuracy is required. Constructed from steel, the gage resists wear under repeated use in shop environments. Machinists, toolroom technicians, and quality inspectors use this type of gage to verify that drilled, reamed, or bored holes fall within specified tolerance limits before parts move to the next stage of production.

This plug gage is suited for use in production and toolroom settings where hole diameter conformance must be confirmed quickly and reliably. It is appropriate for both incoming inspection of raw stock and in-process checks on machined components. The 0.71-inch nominal size covers a common bore dimension found in general mechanical assemblies. Class ZZ Plus designation indicates a standard tolerance grade used for checking work piece tolerances in production inspection rather than master or reference gage applications.

Key Features

• 0.71-inch nominal measurement diameter for precise bore inspection
• 0.0002-inch tolerance for reliable go/no-go dimensional verification
• Steel construction for durability and resistance to wear in shop environments
• Class ZZ Plus tolerance grade suitable for production inspection use
• Compact and lightweight at 0.2 pounds for easy single-handed operation

Compatibility

Designed as a standard Class ZZ Plus plug gage for production inspection of 0.71-inch nominal diameter bores and holes in general machined components.

Installation Notes

Plug gages are handled and used by machinists, quality technicians, and toolroom personnel rather than installed in a system. Before use, clean the gage and the bore being checked to remove chips, coolant, and debris that could affect readings. Do not force the gage into an undersized hole, as this can damage the gage surface and compromise accuracy. Store the gage in its protective case when not in use to prevent nicks, corrosion, and dimensional drift.