Spi 29-382-9 Class Zz Plus Plug Gage 0.382 in

Product Description

The SPI 29-382-9 is a Class ZZ Plus plug gage designed to verify bore diameters with a nominal measurement of 0.382 inches. Built from steel, this go/no-go style gage provides a tolerance of 0.0002 inches, making it suitable for quality control inspection tasks where consistent dimensional verification is required. Class ZZ gages are the standard choice for production inspection of general-tolerance holes. Machinists, toolroom technicians, and quality control inspectors use this type of gage to confirm that drilled, reamed, or bored holes fall within specified acceptance limits before parts move to the next stage of assembly or shipment.

This plug gage is used in machine shops, manufacturing facilities, and toolroom environments where hole diameter verification is part of standard inspection workflow. It is appropriate for inspecting holes in metal, plastic, or composite components where a nominal 0.382-inch bore must be confirmed. Class ZZ Plus designation indicates it meets the tolerance grade suited for general production inspection rather than laboratory or master-gage applications.

Key Features

• Nominal measurement diameter of 0.382 inches for direct bore verification
• Tolerance of 0.0002 inches for reliable Class ZZ production inspection
• Steel construction for durability in shop-floor environments
• Class ZZ Plus classification meets standard production gage tolerance grades
• Compact and lightweight at 0.2 pounds for easy single-handed use

Compatibility

Designed as a direct-fit Class ZZ Plus plug gage for inspecting bores with a nominal diameter of 0.382 inches in general production and toolroom inspection applications.

Installation Notes

Plug gages do not require installation but should be handled and stored carefully to prevent surface damage that could affect measurement accuracy. Clean the gage and the bore to be checked before use to remove chips, oils, or debris that can introduce false readings. Do not force the gage into an undersized hole, as this can damage the gage land and compromise its tolerance class. Periodic calibration against a certified master gage is recommended to maintain measurement integrity over time.