Spi 29-164-1 Class Zz Plus Plug Gage 0.164 Inch

Product Description

The SPI 29-164-1 is a Class ZZ Plus plug gage designed for precision go/no-go inspection of cylindrical holes with a nominal diameter of 0.164 inches. Built to Class ZZ tolerance standards, this gage carries a tolerance of 0.0002 inches, making it appropriate for general-purpose inspection work where tighter gage grades are not required. Constructed from steel for durability and wear resistance, it is a straightforward, single-piece inspection tool used by machinists, quality control technicians, and toolroom personnel to verify bore size conformance during production or incoming inspection.

This plug gage is suited for use in machine shops, manufacturing facilities, and toolrooms where hole diameter verification is part of a standard quality assurance process. It fits applications requiring inspection of drilled, reamed, or bored holes at the 0.164-inch nominal diameter. The Class ZZ Plus designation indicates a commercial-grade gage appropriate for checking parts where tolerance requirements are moderate rather than precision or master-grade.

Key Features

• Nominal measurement diameter of 0.164 inches for precise bore inspection
• Class ZZ Plus tolerance rating of 0.0002 inches for general-purpose go/no-go inspection
• Steel construction provides durability and resistance to wear during repeated use
• Compact single-piece format for straightforward handling in production or toolroom environments
• Packaged individually for direct deployment to inspection stations

Compatibility

Designed as a general-purpose go/no-go plug gage for inspecting cylindrical bores with a nominal diameter of 0.164 inches in machined components across standard manufacturing and toolroom applications.

Installation Notes

Plug gages are handled and used by quality control technicians and machinists rather than installed in a system. Clean the bore and gage contact surfaces before use to prevent false readings caused by chips, coolant, or debris. Store the gage in its protective case when not in use to prevent damage to the precision-ground surfaces. Calibration and periodic inspection against master references should follow ASME B89 standards or the applicable shop metrology program.