Spi 29-163-3 Class Zz Plus Plug Gage 0.163 in Dia

Product Description

The SPI 29-163-3 is a Class ZZ Plus plug gage designed for precision bore and hole measurement in machining, manufacturing, and inspection environments. It measures a nominal diameter of 0.163 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection workflows where tight dimensional control is required. The gage is constructed from steel for durability and dimensional stability. Machinists, quality control technicians, and tool-and-die professionals use this type of gage to verify that drilled, reamed, or bored holes meet specified tolerances before parts advance to the next stage of production.

This plug gage is suited for use in precision machining shops, fabrication facilities, and inspection departments working with small-diameter bores. Class ZZ Plus gages fall within the working gage classification and are commonly used for production-floor inspection of components where a 0.163-inch nominal bore diameter must be confirmed. The single-piece package makes it a straightforward replacement or addition to an existing gage set.

Key Features

• Nominal measurement diameter of 0.163 inches for small-bore inspection
• Tolerance of 0.0002 inches for precise go/no-go verification
• Class ZZ Plus designation suited to production working gage applications
• Steel construction for dimensional stability and long service life
• Compact, lightweight design at 0.2 pounds

Compatibility

Designed as an OEM-style working gage for use in standard plug gage handles and holders accepting 0.163-inch diameter gage members.

Installation Notes

Plug gages are handled and used by machinists and quality control inspectors following standard metrology practices. Keep the gage clean and lightly oiled when not in use to prevent corrosion and wear on the measuring surface. Do not force the gage into a bore; damage to the gage member or part can occur if excessive insertion force is applied. Calibrate or verify against a master reference standard at regular intervals per your facility quality plan.