Spi 29-176-5 Class Zz Plus Plug Gage 0.176 in Dia

Product Description

The SPI 29-176-5 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of small-diameter bores and holes. It measures a nominal diameter of 0.176 inches with a tolerance of 0.0002 inches, providing the close-tolerance verification required in precision machining and manufacturing environments. Constructed from steel, this gage delivers the hardness and wear resistance needed for repeated use in production or inspection settings. Machinists, quality control technicians, and tool-and-die professionals use Class ZZ gages for in-process and final inspection of drilled, reamed, or bored features.

This plug gage is suited for inspection applications in machine shops, manufacturing plants, and precision fabrication facilities. It is used to verify that a hole or bore meets specified dimensional requirements before assembly or further machining. The 0.176-inch nominal diameter makes it appropriate for small-diameter features common in mechanical components, fastener clearance checks, and close-tolerance assemblies. Its compact size and single-piece construction allow for quick, repeatable checks at the workbench or on the production floor.

Key Features

• Nominal measurement diameter of 0.176 inches for small-bore inspection
• Class ZZ Plus tolerance of 0.0002 inches for precise go/no-go verification
• Steel construction for durability and resistance to wear during repeated gauging cycles
• Compact, single-piece design suited for bench or floor inspection use
• Individual packaging protects the gage surface and tolerance integrity during storage and transit

Compatibility

Designed as an OEM-style Class ZZ Plus plug gage for standard go/no-go inspection of bores and holes with a nominal diameter of 0.176 inches in precision machining and manufacturing applications.

Installation Notes

Plug gages should be handled by qualified inspection or machining personnel using clean, dry hands or cotton gloves to prevent surface contamination that can affect dimensional accuracy. Before use, verify the gage and workpiece are at the same ambient temperature to avoid thermal expansion errors. Store the gage in its protective case when not in use, and inspect it periodically for wear or damage that could compromise measurement integrity.