Spi 29-708-5 Class Zz Plus Plug Gage 0.708 Inch

Product Description

The SPI 29-708-5 is a Class ZZ Plus plug gage designed to verify that a bored, drilled, or reamed hole meets a specified minimum diameter. With a nominal measurement diameter of 0.708 inches and a tolerance of 0.0002 inches, this go-style gage provides the precision required for close-tolerance inspection work. Constructed from steel for durability and dimensional stability, it is used by machinists, quality technicians, and tool-and-die professionals performing in-process or final inspection on machined parts.

This plug gage is suited for dimensional inspection in manufacturing, job shop, and production environments where hole diameter conformance must be verified quickly and reliably. The Class ZZ Plus designation indicates this gage meets the tolerance requirements of the ZZ class as defined by ANSI/ASME standards for plain cylindrical plug gages. It is appropriate for checking holes in metal components where a 0.708-inch nominal bore diameter is specified on the engineering print.

Key Features

• Nominal measurement diameter of 0.708 inches for precise hole conformance checking
• Tolerance of 0.0002 inches meets Class ZZ Plus ANSI/ASME gage standards
• Steel construction provides hardness, wear resistance, and long service life
• Go-gage function confirms minimum acceptable hole diameter quickly during inspection
• Compact and lightweight at 0.2 pounds for easy hand use at the machine or inspection bench

Compatibility

Designed as an OEM-style inspection gage for use wherever a 0.708-inch nominal diameter plug gage conforming to Class ZZ Plus tolerances is specified.

Installation Notes

Plug gages are used by quality control and machining professionals and require no permanent installation. Before use, clean the gage and the bore being checked to remove chips, coolant, and debris that could cause false readings. Do not force the gage into an undersized hole, as this can damage the gage and compromise its calibration. Store the gage in its protective case when not in use to prevent corrosion and wear.