Spi 29-082-5 Class Zz Plus Plug Gage 0.082 in

Product Description

The SPI 29-082-5 is a Class ZZ Plus plug gage designed for precise go/no-go inspection of small-diameter bores and holes. It measures a nominal diameter of 0.082 inches with a tolerance of 0.0002 inches, making it suitable for tight-tolerance quality control work on the shop floor or in an inspection environment. Constructed from steel, this gage provides the durability and dimensional stability required for repeated use in production settings. Machinists, quality technicians, and toolroom professionals use plug gages like this one to verify that drilled, reamed, or punched openings meet specified dimensional requirements.

This gage is intended for applications where small-diameter hole inspection is critical, including precision machined components, instrument housings, hydraulic fittings, and similar parts produced to close tolerances. Class ZZ is a standard commercial-grade tolerance class used widely in general manufacturing and inspection. The Plus designation indicates the gage is made to the high side of the tolerance band, extending service life by allowing for wear before the gage falls out of tolerance.

Key Features

• Nominal measurement diameter of 0.082 inches for small-bore inspection
• Class ZZ Plus tolerance classification for general commercial inspection use
• Tolerance of 0.0002 inches for accurate go/no-go verification
• Steel construction for durability and dimensional stability
• Plus designation extends usable gage life by providing wear allowance
• Compact, single-piece design suited for bench and in-process inspection

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go inspection of 0.082-inch nominal diameter holes in general manufacturing and quality control applications.

Installation Notes

Plug gages should be handled by quality technicians or trained inspection personnel. Clean and deburr the hole to be checked before inserting the gage to avoid false readings or gage damage. Store the gage in its protective case when not in use to prevent nicks and corrosion that would affect accuracy. Periodic calibration against a certified master is recommended to maintain traceability to dimensional standards.