Spi 19-572-7 Class Zz Minus Plug Pin Gage 0.572 in

Product Description

The SPI 19-572-7 is a Class ZZ minus plug pin gage machined from steel and used to verify bore and hole dimensions in precision manufacturing and inspection work. The gage measures 0.572 inches in diameter and carries a minus tolerance of 0.0002 inches, placing it within the Class ZZ standard for general-purpose dimensional inspection. Machinists, quality control technicians, and tool-and-die professionals use plug pin gages like this one to confirm whether a drilled, reamed, or bored feature falls within an acceptable size range. The steel construction provides adequate hardness and wear resistance for regular inspection use on production floors and in machine shops.

This gage is suited for use in any facility where hole-size verification is part of the quality process. Typical applications include incoming inspection of machined components, in-process checks during drilling or reaming operations, and final inspection of precision assemblies. It is appropriate for both light-duty job shop environments and higher-volume production inspection where a reliable, single-dimension go or no-go check is required. The 0.572-inch diameter covers a common bore size used in mechanical assemblies and fixture work.

Key Features

• Class ZZ minus tolerance of 0.0002 inches for general-purpose inspection use
• 0.572-inch nominal diameter for direct bore and hole verification
• Steel construction provides durability and resistance to wear in shop environments
• Compact, single-piece design requires no calibration equipment at point of use
• Package quantity of 1 — suitable for individual purchase and replacement

Compatibility

Designed as a standard Class ZZ minus plug pin gage for general-purpose dimensional inspection of 0.572-inch diameter bores and holes in machined components and assemblies.

Installation Notes

Plug pin gages are handled and applied by machinists and quality control technicians, not installed in the traditional sense. Before use, clean the gage and the bore being checked to remove chips, oil, and debris that could affect the reading. Do not force the gage into an undersized hole, as this can damage the gage surface and introduce measurement error. Store the gage in its protective case and away from surfaces that could cause nicks or corrosion when not in use.