Spi 29-722-6 Class Zz Plus Plug Gage 0.722 in

Product Description

The SPI 29-722-6 is a Class ZZ Plus plug gage machined to a nominal diameter of 0.722 inches with a tolerance of 0.0002 inches. Plug gages of this class are used to verify that a drilled, bored, or reamed hole meets a specified diameter within tight tolerance limits. The 29-722-6 is constructed from steel for durability and dimensional stability under repeated use. Machinists, toolroom technicians, and quality control inspectors rely on Class ZZ plug gages as a straightforward go or no-go verification tool during in-process and final inspection of machined components.

This gage is suited for use in machine shops, manufacturing facilities, and maintenance environments where hole diameter verification is required. It is appropriate for checking holes in metal, plastic, or composite workpieces where the specified nominal diameter is 0.722 inches. The compact, single-piece design allows for use at the machine, on the inspection bench, or on the shop floor without additional tooling or setup.

Key Features

• Nominal measurement diameter of 0.722 inches for direct hole verification
• Class ZZ Plus tolerance of 0.0002 inches provides reliable go or no-go inspection
• Steel construction for wear resistance and dimensional stability
• Single-piece plug design requires no assembly or calibration setup before use
• Compact form factor supports use at the machine or on the inspection bench

Compatibility

Designed as an OEM-style precision measurement tool for verifying 0.722-inch nominal diameter holes in machined components across general manufacturing and toolroom inspection applications.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians rather than installed in a system. Before use, clean both the gage and the workpiece hole to remove chips, coolant, and debris that could affect the measurement. Do not force the gage into a hole; excessive insertion force can damage the gage land or the workpiece. Store the gage in a protective case away from other tools to prevent surface damage that would compromise measurement accuracy.