Spi 29-682-2 Class Zz Plus Plug Gage 0.682 in

Product Description

The SPI 29-682-2 is a Class ZZ Plus plug gage designed to verify bore and hole diameters to a nominal measurement of 0.682 inches. Built from steel, this fixed-limit gage delivers a tolerance of 0.0002 inches, making it suitable for production inspection and quality control applications where consistent dimensional verification is required. Machinists, tool-and-die makers, and quality technicians use plug gages like this one to confirm whether a drilled, reamed, or bored hole falls within specification. The go/no-go style of measurement eliminates reliance on variable gauging and speeds up high-volume part inspection.

This gage is well suited for use in machine shops, manufacturing facilities, and production environments where hole diameter conformance must be verified quickly and reliably. The Class ZZ Plus designation places it in the working gage category, appropriate for shop-floor inspection rather than master or reference applications. Its compact, lightweight form allows easy handling during routine part checks on a variety of workpiece materials and configurations.

Key Features

• Nominal measurement diameter of 0.682 inches for precise bore verification
• Tolerance of 0.0002 inches supports accurate Class ZZ Plus working-gage performance
• Steel construction provides durability for repeated shop-floor use
• Fixed-limit design speeds up go/no-go inspection without variable gauging
• Lightweight at 0.2 pounds for easy single-hand operation

Compatibility

Designed as an OEM-style working plug gage for use in standard bore and hole inspection applications requiring a 0.682-inch nominal diameter measurement.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians — no installation in a mechanical system is required. Before use, clean both the gage and the workpiece bore to remove chips, coolant, and debris that can affect measurement accuracy. Store the gage in its protective case when not in use to prevent damage to the ground and lapped surfaces. Calibration intervals should follow your facility quality management procedures to maintain measurement traceability.